Today (12/22/12), use your Discover Card and you can get double cash back. You’ll have to login to your account and sign up for the 2% Cashback Bonus on all purchases. These purchases are not added to your annual purchases eligible for 1% Cashback Bonus. Allow up to two billing periods for the Cashback to be posted on your account. This promotion should stack with the 5% Cashback for online purchases.
With a Discover card, there will be frequent opportunities to get double Cashback Bonus. For example, during the month of your birthday and other big holidays, you’ll also get this same perk. If you don’t have a Discover card, you can sign up for one here.