I just have to tell you to click on over to Mummy Deals and watch her 10 part series on slashing your grocery bills. This is really good stuff! Such simple things to do that will make a HUGE difference in your budget. Sure, there are things she addresses that you already do (pat yourself on the back!), but there is so much more here that you could easily implement!
Run on over and check her site out! It'll be worth it! (And she has a great accent to boot!)