I love MyPoints.com.  It is easy to get lots of small points through their e-mails and easy offers.  They have a pretty generous system for getting points for shopping.  You just have to always remember to go through their site (sometimes I forget and kick myself for it later!!).  I never seem to qualify for the survey's they send out but I keep trying!  They have a fantastic selection of gift cards to choose from for your reward.  It is nice to have a large choice not all sites do this.  I have recommended  this site to a lot of people and you do get points for referrals.