I make a basic list, and I go off of the digital coupons my grocery store offers, but also the deals. Sometimes, even if I don't need something, I'll buy ahead just to get $5 off the bill, which helps in the long run. My list are my Must Haves and then I'll also go to the meat department to see which ones have the Manager's yellow stickers that are deep clearances. Those really freeze well and I grab what I think we'll need.