Most people making money through a sales commission program will tell you it's a lot of work. You need to find the commission programs that make the most sense for your target audience. You also need to publish content that brings visitors to your site--without a decent amount of traffic, you won't generate high enough click-throughs to add up to much.
It is important to put some effort into commission tracking. In order to do this successfully, it is beneficial to:
• Figure out which merchants are paying you the most
• Figure out which pages perform the best
• Experiment to find out what style of writing, what web site design, and what kinds of ads work the best to generate a working sales commission program that makes you happy