Just saw this on www.moneysavingmom.com which she found on www.thefrugalfind.com. I have copied and pasted here for you.

Walgreens:
Buy 2 packages of Oscar Mayer Ready-To-Serve Bacon at $1 each
Use 2 $0.75/1 coupons from the 3/21 SmartSource insert
Spend $0.50 plus tax out of pocket, Get $1 Register Rewards
Free plus $0.50 overage after coupons and Register Rewards