I've been able to bring down our monthly food budget from $800 to $300 over the past year (family of 6 - 2 of which are teenage boys!).
I've done the following:
- I subscribe to a coupon service with a sales/deals forum
- Weekly I order the hard to get coupons from the service
- Weekly I get ~8 Sunday papers for the coupons
- I make out my grocery list based on where the sales are that match the coupons
- For the non-perishables, I stock up when they're on sale (incl pull ups)
- I shop in stores that double and triple coupons. I've found that Walmart and Target are not as cost effective as they'd like us to think. You can get really good deals, but they are few in between
Good luck!!!