I just signed up with SHOPˇCOM's "Get Paid to Shop" program and thought you guys might like to join, too. You get up to 50% cashback for every qualified purchase you make on the site. On any personal referrals, you'll also make 1/2% on their qualifying purchases!
The best thing is there is this browser add on shopbuddy which will automatically track your spend so you dont have to always go through the portal. its on the left hand side of the homepage. They also have cashback for travel sites like priceline, travelocity, orbitz, hotwire, etc.