Build an affiliate blog Affilliate Online moneySet up a blog, promote the blog, and use it to promote affiliate offers. This is by far the best known way to generate a source of passive income online. Start with an affiliate site like ClickBank or Commission Junction. Find a few offers in a category that you know a bit about. Ideally offers with some degree of recurring income. Make sure they have good numbers, and do your keyword research to make sure there’s demand. After figuring out what keywords to optimize your blog for, start a new blog and write articles. SEO optimize the blog, and promote it around the web. Once the traffic numbers start going up, deploy some ads for affiliate offers. People click on the ads, and you get paid. Now repeat the process until you have ten or twenty blogs, or maybe hundreds if you want to make some serious cash online.