Best purchase I ever made was a vacuum sealer machine. i pre-prepare all my meals to a trip at home then just seal them, and if needed freeze them. for breakfast I make up a bowl of porridge add 3 tablespoons of coffee whitener, some sugar, mixed fruit, and a bit of maple syrup. vacuum seal it. make one for each day. that breakfast sorted.
Dinner = Mattersons sausage sliced and diced, pasta, with so dried veg and a bit of sauce, three little bags, open boil pasta, add sausage, and sauce and veg, lid on 20 mins done.
Dinner 2 = frozen turkey (sliced) and curry paste added in one bag, sliced onions and in another, and a pack of remeasured rice. Add turkey mix to pot and cook until starting to brown, add onions and water or coconut milk lid on. put on rice, 20 mins done
Dinner 3 = Chorizo Sausage, cannellini beans (these need soaking overnight, before use, or just pre-soak and seal) Olive oil, finely chopped oinions, chicken stock from a cube, some cooked chicken or better still a breast of pigeon, or any game bird. Fry sausage until just going brown, add beans to soak up that nice red oil, add oinions, chicken stock and cook down for 30 mins, add breast, and enjoy.
Snacks- any chocolate you want or GORP (Good Old Raisins, and Peanuts)
Lunch -Bannock (premixed and sealed into portions).
I find that those insulated freezer bags that you put your shopping in help keep any frozen stuff cold for a Day or two max.
Hope that give you some ideas
Da