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.
If you’re an experienced nanny or babysitter, Care.com is the place you want to make money. By listing yourself on the Craigslist of Childcare, you’ll broaden your reach and increase your odds of finding the right gig at the right time. You can be pickier with what kids you watch when you have the reputation and traffic to pull in more customers. Join Care.com and start making money by investing in the future of our youth.
If you have a propensity for writing and you can slay with your prose, consider writing an ebook. While the market has certainly become saturated as of late, books that help teach people about a technical topic still sell extremely well. This is a great source of passive income but does require a large amount of effort at the outset before any money is generated.