MSN Money ran an article about credit cards that give cash back to consumers. Out of the 20 credit cards they reviewed, the winner was American Express Blue Cash. 

Once again, American Express Blue Cash leads the pack with its 5% rebate on “everyday purchases” at supermarkets, gas stations and drugstores, and its 1.5% rebate everywhere else. Unlike many other cash-back cards, there is no cap on the rebates you can earn. The trick is that you have to spend at least $6,500 annually to get this rate of return; until you hit that magic level, your rebate is 1% on “everyday” purchases and 0.5% on everything else.

I kind of agree with the selection but there are some other great credit cards like Chase Freedom.  Nonetheless, a very solid card that you should in your wallet.

Get 12 Months of 0% APR Rate with 5% back at supermarkets, gas stations and drugstores.