Commercial use requires 'releases' - editorial use doesn't. Stock photos can be sold for commercial (eg, marketing) or editorial (ie, journalistic) use. You'll have more opportunities to make cash if your photos are available for both, but photos containing people or property (including branding and logos) need signed releases to be sold commercially.
Upwork: This website offers a great marketplace for selling just about any professional service. You don't need a merchant account, website of your own or anything else for that matter. All you need to do is be able to provide a high-quality service at a reasonable price. But be informed, you will have to compete with many others that are constantly bidding on open jobs.
You'll also need ecommerce software, fulfillment software, worry about warehousing, customer service, refunds and so on. But that's not all. You'll also need traffic. Think search engine optimization, Facebook ads, and other social media campaigns. Sound like a lot of work? Sure, it is. Especially if you do it all on your own. You could opt for Amazon's platform, which might be the easier route. But, then again, at the end of the day, this is a serious business, which could produce significant profits. So you're either all in or you're not.
OfferUp.com. If you don't have the energy to hold a yard sale, OfferUp may be the next best, profitable thing. Sell one thing at a time. Take a picture of what you have, put down a price and hopefully somebody nearby will see it online, love it enough to buy it, send you a note and you'll meet – in a public place, OfferUp's website recommends – and you can get your cash for whatever you're selling. Of course, you might ask how this is different than selling on, say, the ever-popular Craigslist. Some users claim that it's an easier site to post on, and members have profiles, so you can rate each other and get a better sense that people are who they say they are, which isn't always the case on Craigslist. Nevertheless, you'd still do well to use common sense and buy and sell OfferUp items in public places rather than at someone's home or in the dark woods.
Etsy. Are you crafty? This is one of those websites where, once again, it helps if you have a real skill. If you're artistic and are the type of person who can make custom jewelry or refrigerator magnets with the best of them, Etsy is the place to sell it. For the rest of us, we must find another website to go to, so we can earn money to buy things from the crafty people at Etsy.
5. Fiverr – Fiverr is a great place to make a few bucks or spend a few bucks if you need some of the services people offer. Basically, everything is $5. You either pay $5 or charge $5. They call them “gigs.” You can offer your services however you choose. If you sell art and you’re fine selling pieces for $5 each, that’s a gig. If you’re a graphic designer and you want to offer your services for $10/hour, simply offer a 30 minute gig. If they need two hours of graphic design, they pay you $20, or $10/hour by buying four gigs.
Fiverr. This is a popular website that can be helpful for freelancers with actual skills. Know something about digital animation? You can work for someone who doesn't and pick up some extra cash. But if you just have a brain but few skills, you can offer to do web research for someone, and maybe someone will hire you. Just know that you probably aren't going to get rich doing these jobs. The website's tag line is, "Freelance services for the lean entrepreneur," which tells you right away the pay is – meh. Plus, the website's name comes from the fact that many people work for $5 per task (but, yes, you can ask for more). Still, if you get a lot of gigs, it can add up.
Acorns rounds up your everyday credit and debit transactions and automatically invests the spare change for you. It's only $1 a month and free for college students with an .edu address for up to four years from the date of registration. You'll barely notice the micro-investments of spare change, plus the Found Money feature invests money in your account when you shop with Acorns partners such as Macy's, Nordstrom, and Walmart.
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. 
It can take time to build up your personal freelance business. Yet, there is more demand than ever for freelancers. So, if you want to kick start making money online through freelancing you can join one of the top freelance networks, such as Flexjobs, SolidGigs, Upwork, Fiverr, or PeoplePerHour. Sign up, build your profile, upload some samples of your work and start making extra money by doing small freelance jobs.
The hardest part about saving money is actually transferring the funds out of your checking account and into a savings or emergency fund. No one wants to see their savings account drop without an immediate benefit! But with Rize, you can automate saving so you never have to think about it. Just set a savings goal and a date, and Rize will do the rest.
Fiverr is one of the biggest providers in the gig economy on the web and you can sell a wide variety of services and products through this medium. Do the research and find out what you can offer. However, keep in mind that like any other money-making task, it takes time to succeed here. And stellar reviews will help you generate more and more income over time.
Be a mommy (or daddy) blogger. If you haven’t used your free time between changing diapers, washing clothes and shuttling kids around to hop on the blog bandwagon, it’s worth considering this potential source of income. And just because you’re a parent doesn’t mean you have to write about parenting issues. In fact, given that there already are so many blogs about life as a mom (or dad), consider writing about another topic about which you are passionate. The more original, entertaining and informative you are, the more likely you’ll gain followers – and you need an online following to make money.
Buy and sell domain names. If you’re good at finding popular yet undiscovered domain names, you can make some cash on the side by buying and reselling websites. Think of it as digital real estate speculation. Domains are available on GoDaddy.com for as little as $2.99 per year, but are sometimes resold at far higher prices: According to Business Insider, the site MM.com sold for $1.2 million dollars in 2014. Once you find the perfect domain name to resell, you can market it on Flippa.com for a flat fee.
If you’re looking for inspiration, my friend Michelle Schroeder-Gardner of the website Making Sense of Sense has become the expert on all things affiliate marketing. Michelle earns more than $100,000 per month from her blog and the bulk of her income comes from affiliate sales. Michelle has had so much success with affiliate marketing that she even has her own course called Making Sense of Affiliate Marketing.