Thanks to Lauren for passing this along,
I find that one way that I can stick to my $50 a week on groceries is making out a weekly menu according to what is on sale, what I have coupons for and so forth. OrganizedHome.com has free printable menu planners. They have weekly, monthly menu templates that include space for notes and a shopping list. I also found that they have spreadsheets for pantry inventory, fridge/freezer inventory, price list for the min amount you know to spend on something. Perhaps your readers will find these useful to keep track of everything.