Ebates is a site I have been using for the past few years. You go to their site before you buy something online, search in their search field for the site you want and click on it. It brings you to that site and voila...you get 1-8% of your purchase total. It doesn't sound like much but with Xmas shopping coming up, it adds up quickly. I have about $25 to be sent to me; they send you a check!
It's easy, it's fun to get free money.
Here is the link. If you sign up, you will get an extra $5 and you will earn me moolah too for referring you.