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 such as poster designs. Affiliate Marketing
Do you have an area of expertise? Share your advice on a blog. If travel is your area of expertise, think about what you have to offer: Are you an expert in luxury travel or budget travel? Can you share advice about certain activities like hiking or shopping? “The more specific you get, the easier it’ll be to attract an engaged audience and to earn money with your site,” advises International Living. The sites Squarespace and Wix have tips on how to create blogs and can also host them.
If you're serious about making money online, start a blog. Blogging is one of the easiest and most sustainable income sources. As long as the blog is setup the right way, in the right niche, with the right content targeted at the right audience, and the offer is complementary to the content, you could make a tremendous amount of passive income from a blog.