I use all the usual ones: frozen veg, pastry, tinned toms etc but at this time of year I ensure I also have certain things in the freezer. Mince, chopped onions, sliced mushrooms, frozen mash and Sainsbury's do a good range of frozen stewing steak and ready sliced stew veg. Then I know if we get snowed in, I can still produce stew, or spag bol or shepherds pies without needing fresh produce.
I rarely buy ready produced meals unless I'm on a diet and want a strictly calorie controlled meal just for me, but we do have the occasional beef or chicken pie or fish cakes, do they count as ready meals?