However, like anything else truly worthwhile, apps require a significant investment of your time or money upfront. If you don't have the skills, then you have to hire someone who can assist you in creating a great app. But first you need to come up with an idea that will sell. Do the proper market research and analytics to come up with the right app.
Great list! I’ve used Poshmark to sell clothes/accessories. You take up to 4 photos, add a description, and set a size, color, and brand. I’ve sold 3 items so far (two dresses and a pair of shoes) and it’s easy. The buyer can purchase at listing price or make you an offer, to which you can counter-offer. At all times, you can see what your profit will be from your listed price. Once the transaction is accepted, you are emailed a prepaid shipping label to print. You package your item up in a brown box and ship, and when the seller receives it your funds are released. You can cash out as a direct deposit to a bank account at any time or use the funds to shop. I’ve also purchased a pair of jeans on the site and they arrived as expected. For like-new and designer labels it’s a great way to clear your closet and make a little cash all at once.
@dasjung No doubt! I know this and you know this, and any other highly skilled and educated designer will also know this. But what about the customers? The people who are looking for a logo design with much consideration of price in this economy. Knowledge and talent expect the monetary reimbursement it deserves, but unless everybody has a trained eye to recognize it, they just aren’t going to dish out the money for it. That is the point I am trying to make. It is like calling the neighborhood handyman instead of a high cost plumber to fix a small leak.
However, people can still do webinars without all of that. For example, you might have a sizable social media following and you train them every week on something to do with social media. But you will need a product to embed and sell at some point. Don't worry about it in the beginning. And by far, the best webinar platform out there is certainly GoToWebinar. Hands down, there isn't even another platform that comes close.
Find a profitable niche. Starting with your interests, write down as many niche ideas as you can. Think about topics people might search online. Ideas include passions (like surfing or body building), fears (like spiders or speaking in front of crowds) and problems (like getting out of debt). Do keyword research to see it others are interested in the topic. Find out if a domain name is available that matches the keyword 100 percent. 
If you have specific writing/journalism skills or are adept in various IT/software domains, freelancing may prove to be a lucrative source of secondary income. Increasingly, companies are implementing a content marketing strategy and turning to outside sources for specific assignments, and if you can prove your worth there will be more work available. Even simple skills like data entry may be to your liking, provide you can offer at least 5-10 hours weekly.
Sometimes the best side hustle is putting in the time to get a better job. Investing in your career can have profound effects and help your earnings increase exponentially over time. Maybe one day you'll earn so much at your day job, you won't need a side hustle! I recommend browsing job boards like ZipRecruiter or even checking out a company like Pathrise. In their program, you will learn the all secrets from industry experts, armed with proprietary tools and data, to land a higher paying job and make more money.
Consider your expertise. If you take the time to reflect on your experiences, you will realize that you have more knowledge about which to write than you might think. Begin by listing three assets that define you, such as your profession, a special hobby or a personality trait. Next, list three things that inspire you, such as religion, education or charity. Finally, list three of your dreams, such as getting married, traveling or spending more time with your children. These three lists should give you many ideas of topics about which you can write.
Please note that some of the links below are affiliate links and at no additional cost to you, I will earn a commission. Know that I only recommend products, tools and learning resources I've personally used and believe are genuinely helpful, not because of the small commissions I make if you decide to purchase them. Most of all, I would never advocate for buying something that you can't afford or that you're not yet ready to implement.
Webinars are quite possibly one of the most potent ways you can make an exorbitant amount of money online. Russell Brunson often says that if you do a webinar every single week for a year, you'll be a millionaire at the end of it. You'll need an audience to train and you'll need to know what you're talking about. Of course, this usually requires having a website and some semblance of an online presence.
Use your blog to share hobbies, thoughts, and passions with others and use your blog to make real connections with people. The mechanics are straightforward, and you'll be able to profit with your blog via online advertising (e.g. Google Adwords), affiliate marketing (see below), and subscriber-based lists to produce a steady stream of income. There are many ways to make money with a blog.
If you have a background in marketing and a passion for a particular niche, then organizing a virtual event may be just up your street. A virtual event could span across a day or longer. Individual live sessions would be run by experts in the field. And conference features would include live question and answer sessions, forums, and plenty of free giveaways. Visitors to the virtual event would pay to attend, so the more effective your promotion of the event the more money you would make.
Many big businesses are looking for social media influencers to become long-term ambassadors for their brand. This would involve you working closely with one particular band, and promoting their clothes, products, and services. You may also be restricted from promoting other brands, so check out the small print before agreeing to any long-term agreements.
Sell baked goods. Working parents might not have the time to whip up a birthday cake or cupcakes for school parties. That’s where you come in if you can create tasty baked goods. A friend of mine who is a single mom started making cupcakes as a way to keep herself occupied while staying with her dad when he was undergoing chemotherapy. She posted a picture of her cupcakes on Facebook and instantly received several orders from friends. Now she makes about $200 a month making cupcakes for others who hear about her through word of mouth or see pictures of her cupcakes on her Facebook page.