Starting October 1st and running through December 31st, every time you use your Discover Credit Card at Grocery Stores, you'll get 5% cashback! That savings is huge!
It's only good for up to $400 of purchases (thanks Jess!) - but that's still $20 in Cash Back Rewards!
Remember though - credit card rewards don't mean squat unless you can pay off your balance each month and not pay interest. You have to sign up through discovercard.com and enter your account information to be eligible for this program - it doesn't just happen automatically. They do 5% cash back bonuses quarterly.
By the way, the 5% cash back is also valid at restaurants and movie theaters for the months of October, November and December.