Plan a Menu ~ If I don't plan a menu and write an exact list when going to the store I overspend by probably $50 - $100 and I am not exaggerating! Also, when I buy without a plan in mind I can't begin to tell you how many things actually end up in the trash at the end of a week because we didn't get around to cooking them. It is really sad to think about how much money I have wasted doing this. Planning a menu should go hand in hand with looking at your family's activities for the week. If you kids have sports a couple nights or your husband is working late, plan accordingly so nothing goes to waste.
Analyze the Garage Can ~ Look and see what is being wasted each week and adjust your grocery shopping accordingly. I find that I have so much waste on the weeks that I go to the store without a plan (and this includes lunches). I find that I spend so much time focusing on dinners that I just buy ingredients to make lunches without really planning them. I throw out so much rotten cheese, meat and bread this way :-(
Keep a Clean Fridge ~ Don't you just hate it when you clean out your fridge and realize there was a perfectly good pack of cheese underneath everything that you have been using and now it is all moldy! If I don't clean out my fridge and take inventory before heading to the store it never fails that I will buy multiple things that I thought I needed and really didn't and forget the things I really did need.