I have two words for you... COUPON MOM!
This website is fantastic! Click on the link from my blog, it will take you right there. Go to Grocery deals by State in the left column and choose your state. This will show you what to buy and what Coupon to use... you have been saving those Sunday inserts right? AWESOME!
Download the 10 page FREE ebook that has more instruction and tells you step by step, lots of good information in that. It looks allot like what Grocery Smarts does, AND Coupon Mom was on Oprah.. so you know it's legit! Good luck!