Check the bottom of your ACME receipts for your ACME Cash Rewards Points (my understanding is that this program is not available at every store)
You get a 'point' for each dollar spent, though it is including more then actual dollars, manufacturers coupons are getting added in to.
Spend $250 get $5 Cash Reward
Spend $350 get $10 Cash Reward
Spend $500 get $15 Cash Reward
Spend $750 get $25 Cash Reward
I was very excited yesterday to recieve a $10 Cash Reward from ACME (I had no clue about this program before then). Definitely something to keep an eye on towards the end of the month, a gallon of milk just might get you another $5 or $10 reward :-D