Etsy: While Etsy's popularity has declined recently, it's still a great resource for selling handmade items online. No need for complex ecommerce sites or merchant accounts or any sort of automation. The company takes a commission of every sale and charges a small listing fee per item. But many still use Etsy as their primary source of income. The best part is that you can also sell digital products on here such as poster designs.
Take good pictures. Some of the options below don’t require you to actually take the picture and sell the product, but for the ones that do, make sure you take a clear picture that makes your product stand out from the others. If you’re going to be taking a lot of pictures, set up a small “studio-like” area in your home with a backdrop and proper lighting to really make your pictures come across as professional. And of course, you’ll want a good camera too.
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. 
Direct linking: This means you’ll send people directly to the vendor’s sales page. This used to work well and still does in some rare cases but most of the time, it’s not recommended to go down that route. You need to “warm up” your visitor first before sending them to the offer page. Unfortunately, because this is the lazy man’s route, a lot of people choose it.
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.
Video is growing like crazy. And more and more people are looking for professional help cutting their raw footage into viral-worthy content. If you have the right software and a bit of skill, you can easily make money online as a video editor. Check out these article of Fstoppers on how to become an online video editor and then look for relevant jobs on Mandy.com, Creative Cow Job Search, or ProductionHub.