ClickBank is a huge marketplace for selling digital products. And it has the easiest to use affiliate program out there. You literally just sign up, search for products to promote by keyword, and get the code to promote them on your site.

You can also see how much you'll get for every sale, and what percentage of the sale amount that is. Hint - - don't look for the larger total price, but rather the program that offers you the highest percentage of each sale.

The downside: ClickBank has the worst stats tracking of any affiliate network out there. They don't show you how many clicks you've sent to a product, which can be really frustrating. They only tell you when you've made a sale, and how much you made. This approach also doesn't allow for testing to make sure your links are good. But alas, it's basically a must for any serious affiliate marketer. So go sign up for ClickBank and find some products to promote.