But don't make the mistake of thinking this will be a passive source of income—you're on call whenever you have a guest and you'll always need to keep the place clean for incoming visitors. On top of just renting on Airbnb, consider offering your guests paid add-ons, like Lauren Gheysens', Royal Day Out in London, England—where she gives visitors a local's only tour of the city, complete with bespoke 18th century costumes.

These are sites that post short tasks that pay per piece. These tasks may involve anything and everything, including data entry, writing, tagging, surveys, and more. Most don't pay much per piece, but the key to earning substantial extra money with them is getting fast at the tasks you do accept. Below are a few sites to consider trying that pay for short tasks:
If you’ve got expertise in a certain area, package up your knowledge into an online course and sell it. This has become a very popular business model for online entrepreneurs over the past several years. The two big websites that are used to sell online courses are Udemy and Teachable. Check out this awesome article by Regina on How to Create an Online Course that Sells.
Creating a video series and selling it as a digital download on your blog, much like an eBook, can be another great seller. A video course, teaching viewers a specific skill or how to achieve a particular activity, may well resonate with your audience. If you are going to go down this route then your videos need to be as professional as possible so you should consider investing in some video and lighting equipment, as well as editing software.
Leapforce is always looking for people for this work at home role. Their Search Engine Evaluators “conduct research, evaluation, and feedback on search engine results by measuring the relevance and usefulness of web pages in correlation to predefined queries, by providing a comparative analysis of sets of search engine results and various other techniques.”
Multi-vendor marketplaces, like ThemeForest, can be very successful. Chose a niche and create a vendor website for it. Your marketplace could be anything, from a platform for local artists to sell their work on, to an online digital product store. Once set up, invite people in that industry to sell their products on your site. You take a percentage of their profits when items sell.

Clearly, there's a lot of demand on Amazon, and if any product is going to sell, it's going to sell well on Amazon. But the goal here is to source the right products that will easily sell at the world's largest online retailer. Generally, products between $10 and $50 sell very well here. Just be sure to do the right market research before jumping on this bandwagon.
Mechanical Turk: Amazon's Mechanical Turk is a resource for doing human-intelligence tasks, or as the site commonly refers to them, HITs. You get paid a very small fee for any given HIT and you'll need a good deal of volume to make a substantial amount of money. But it is a resource you can use in your spare time to generate a small income online. 
Merch by Amazon is another service offered by Amazon that will enable you to make money online without any initial outlay. To get started you need to create an account with Merch by Amazon. Then simply design some T-shirt logos or slogans, and upload them to your Merch account. You will need to choose a T-shirt type, color, and price, and Amazon will create product pages for each T-shirt. When someone makes a purchase, Amazon takes care of production and shipping. And you are paid a royalty for your design.
Most people do not claim all of the allowances they are allowed to take, which is why they end up getting a large refund check each spring. If you regularly get a large refund, then it may be time for you to file a new W-4 with your human resources department. Your new W-4 should reflect the proper number of withholding allowances you are eligible to take.
A blog highlights your technical ability and showcases your ability to write blog posts. Your blog can be about different topics than those you write about for your clients. In fact, it should be on a topic that interests you. Visitors will see that you can not only write, but you can also build an online community. A good blog has the potential to earn you many referrals for more clients.[24]
Permission Research – You download a software on your computer to understand how people are using the internet. Our goal is to help companies understand digital content trends and patterns so that those companies can give people like you what you want. The businesses and media organizations rely on PermissionResearch to understand how people view and interact with content on the Internet and on TV.
It’s not the sort of online money making opportunity that’s covered in glory, but everyone needs a set of eyes to make sure the numbers add up at the end of the year. Every business and most individuals need someone to help prepare tax returns, especially time or resource-strapped small business owners. The Income Tax School provides an array of training programs that'll certify you with tax prep in as little as 10 weeks, and once tax season rolls around you'll be able to charge an average of $229 per return as a freelance tax preparer with this side business idea, reports CNBC.

You know those top-down cooking or craft videos you just can’t seem to get away from these days? There are people out there making a living from them. 78% of B2C companies depend on user-generated content, like those videos, for their marketing campaigns. You can sign up as a creator on a site like Darby Smart and potentially work with brands like Nordstrom, Mattel, and BarkBox. Or, use them to build your YouTube following and monetize through ads and views.

A blog highlights your technical ability and showcases your ability to write blog posts. Your blog can be about different topics than those you write about for your clients. In fact, it should be on a topic that interests you. Visitors will see that you can not only write, but you can also build an online community. A good blog has the potential to earn you many referrals for more clients.[24]
17. Amazon – Have you heard of FBA? It stands for “Fulfilled by Amazon” and it’s getting pretty popular. Basically, you buy products (in bulk is best) and ship them to Amazon for them to store. When your products sell, Amazon packs them up, ships them out and sends you the money (after taking their cut). There are people making a full-time living from FBA, while others just do it for some extra money.
In our local neighborhood, we've seen this service hired out to place signs in people's yards for announcements or funny pranks. Ha! If you're out and about on a Sunday you'll see plenty of people putting put signs for open houses. You'll probably have a great opportunity for this extra money idea if you can locate a neighborhood where lots of real estate agents or putting out there own signs. Wouldn't an agent rather be prepping the house for sale or doing marketing activities than placing a sign at a busy intersection? You bet and that's why outsourcing to you could work!
Sound up your aisle? Fill out an application through the site, which pairs brides and bridesmaids based on personality and location. You could make between $200 and  $2,000 per month, says Glantz, working anywhere from a few hours a month to a couple of hours a week, and you'll generally handle everything on nights and weekends. Most projects—er, weddings—require between 3 to 11 months of your time.
Check if you need a model release. Photos of people can only be sold for commercial use if they've signed a 'model release' that gives you permission to use their image (children need a parent/guardian to sign). Without a release, these photos can still be sold for editorial use, as long as they were taken in a public place – eg, if you submitted a 'breaking news' shot with people in the background. If there's any doubt, always ask permission.
Set up an account on Rover.com. Enjoy furry company once in a while? These days, many professional pet-sitters set up an account on Rover.com. With Rover.com, you can reach people in your area who are actively looking for someone to watch their dogs, cats, hamsters, or turtles, either in their home or your own. You can set your own rules and schedule and come up with your own pricing through the Rover.com pet-sitting platform.

Sign up to be a part of different survey panels and wait for surveys to come to you via email. Taking online surveys for money typically means answering questions about products and services, but some panels will ask more interesting types of questions. Survey panels usually pay anywhere from $1 to $5 per survey taken or in the form of Amazon gift codes and other types of rewards. Here's a list of reputable survey panels to try:
Now, I know what you’re thinking. Most of the software and apps you use on a regular basis are made by massive companies or established development studios. Well, yes. But many successful apps, particularly those in the Apple and Google stores, are created and marketed by individuals and small businesses. In fact, independent developers made $20 billion in the App Store in 2016 alone.
This isn’t quick money, but you can make decent money with a little luck and solid, consistent effort. Believe me, it can be tough and a bit time consuming, but it can be done. I started PT Money in 2007 and since then the site has grown considerably, now viewed more than 200,000 times per month. The key to blogging is to have a long-term goal of making extra money in mind. You can get started by reading my article on how to make money blogging.

If you are really short on cash and need some immediate funds then you should start by looking around your house. Clear out your cupboards and find any items lying around that you don’t need or haven’t used for a while. Then sell them on eBay. Just because they are gathering dust in your cupboards, doesn’t mean someone else won’t snap them up. Simply sign up with eBay, list your products and then, as they are sold, send them off to the buyers.
White labeling products involves purchasing pre-made products from a supplier and then adding your own labeling and branding. Products could range from candles to gym equipment or even tea, but all will come without labels, allowing you to create your own new range of merchandise. Most suppliers will advertise the fact they offer white labeled goods on their websites, so pick your niche and then find the right supplier and product for you. Once labeled, products can be sold via sites like eBay and Amazon, or from your own eCommerce store (discussed in a moment).
I have tried to sign up & complete cash for surveys in the past and then felt like I was being led down a rabitt’s hole, going from one “skip” and/or “submit” to another without ever, seemingly, actually completing the entire process.  So, when I saw CashCrate recommended in ptmoney.com, I thought it was going to be more straight forward, but, alas, no, I entered the rabitt’s hole once again, coming up for air only after an entire hour spent hopping, skipping, and jumpring all over the place, netting 25 cents in earnings!  Has this been anyone else’s experience and what has been done to remedy the situation?  It seems like there must exist an insider’s trick or, at least, know-how that I am missing. 
Right now on Upwork, they are looking for more writers. Set up a profile and start offering up your fast writing skills. You can make decent money with freelance writing and some people are able to make it a full-time business.  Check out this interview I did with a freelance writer who has had a lot of success and shares how to start a freelance business. Ready to get paid to write for blogs like mine? Check out this course, Get Paid to Write for Blogs, by my friend Catherine.
Did you know you can make money simply by owning a car? It's true, thanks to a company called Turo. Turo is a “car sharing marketplace.” Next time you're in a new city and need to rent a car–instead of using an airport car rental, you could use Turo and rent actual people's cars! (Similar to how Airbnb replaces hotels). Turo lets car owners earn money in three ways: local pickup (renting your car from your own driveway); delivering your car to local places; and also by leaving your car somewhere to be picked up (such as at the airport). Earn Money with Turo.

If you live near a university, there are likely all sorts of research studies looking for participants. While I was an undergrad at Virginia Tech, I got paid $500 to participate in a 6-week dietary study. The study provided all my meals and paid me, but I had to eat a 5,000 calorie diet of 50% fat for 6 weeks, plus I had multiple muscle biopsies, urine/blood testing, etc.
Check if you need a model release. Photos of people can only be sold for commercial use if they've signed a 'model release' that gives you permission to use their image (children need a parent/guardian to sign). Without a release, these photos can still be sold for editorial use, as long as they were taken in a public place – eg, if you submitted a 'breaking news' shot with people in the background. If there's any doubt, always ask permission.
Re-selling web hosting will enable you to make money hosting your own client’s websites. Large hosting companies like HostGator allow you to white label their hosting services. You could start your own hosting business or, if you are a web designer, include hosting into your web design packages. And the best of it is the hosting companies take care of the hosting for you, so all you need to worry about is selling.

Join a startup accelerator: Another great option is to apply to a startup accelerator like Y Combinator, 500 startups, or TechStars, where a group of investors will help coach you, connect you with potential partners, and provide startup cash in return for a small stake in your company. The competition is tough to get into these, so don’t rely on them as your only path forward.
Build up a following on your Instagram account and you could quickly be making extra money online. Major brands, gear companies, and even startups are willing to shell out $500-$5,000+ per post to get in front of your audience. While it’s getting harder and harder to build a massive Instagram audience, if you already have a solid niche and are posting quality content regularly, with a few small tweaks you can make yourself an influencer. Check out this awesome article from Shopify on how to build and grow your Instagram following to get started.
Blogging is also one of the cheapest ways to make money online, aside from the time and and intellectual input that you have to invest. As you begin to make money from your blogging efforts, you can easily outsource for greater scalability. I also use Bluehost and I like the fact that it seamlessly integrates or interfaces with WordPress. You can set-up a domain or subdomain in minutes and start blogging in seconds. I love it!
The two popular ones are Poshmark and TheRealReal. Both make it dead simple to sell (and buy!) luxury items. The RealReal will pay you 60% of the sale price (more if you sell a lot) and Poshmark has a tiered commission structure. Sale prices under $15 pay a $2.95 flat fee and everything else is just 20%. Tradesy is another company and they take just 9%.
If you are a fast reader and have a good grasp of grammar and language then editing may be a good freelance role for you. Editing is a great way to quickly make money online, and there are always editing jobs available on the freelance job sites. Editor’s usually get paid per word, so the faster you can check through work the more money you will make per hour.
Mechanical Turk: Amazon's Mechanical Turk is a resource for doing human-intelligence tasks, or as the site commonly refers to them, HITs. You get paid a very small fee for any given HIT and you'll need a good deal of volume to make a substantial amount of money. But it is a resource you can use in your spare time to generate a small income online. 
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