I've been creating second, third, and even fourth streams of income online for years, since 2002. If you can write, there are places like WriterAccess, WritersDomain, and Textbroker where you can get paid for writing for other people. You can offer your services in something you're good at on Fiverr and include more expensive upsells with it. If you know Wordpress, you can build and flip websites on Flippa. You can do the same thing with domain names, if you choose a good one. I made over $800 selling just one domain name a few years ago. There's a market for them. You can also write (or record) and sell your own info products. Make and sell things on Etsy, or re-sell things on Amazon and eBay. If you're not the entrepreneurial type, get an account at FlexJobs.com, and look for actual companies that are offering work at home jobs and apply to them (some of them even come with benefits).

Hope this helps!