I have really enjoyed my Discover credit card.  It works wonders at the gas station and earns me points for either cash or other awards.  What particularly pleases me is that I can use my points for a value of $20 and get a value of $30 in Blockbuster movie awards.  I would be buying the gas either way, but with this card, I also earn seven free movies, roughly a $30 value at Blockbuster.  We have a large family and four of us drive cars.  When prices were really high (around $4.50), our gas bills were huge, but the rewards stacked up quickly and we were able to enjoy free movies during a...