My DH does a big shop at the Victoria Market once a month for meat and fish. He then lists on the fridge everything that we have in the freezer.
When I get up in the morning I go to the list and pick and then cross it off as it is used. That way I know when to send him back to the market. It usually last's 1mth or so, with a few things like gnocci with a basic sauce or Tuna Casserole so it makes it stretch even further.
I also Fruit n Veg once a week and usually have to top up fruit (my kids love fruit).
I only grocery shop once a week too, so meal planning is very important. It also cuts down on the getting take away too