Leftovers. Cook meat plain then dress up differently with sauces, pasta, rice, condiments, etc. Buy spinach instead of lettuce. If you don't finish before it starts to droop, wilt in microwave, cool and freeze. Makes nice quickee or lasagna.
A lot freezes: peppers in strips, all bread products, milk, butter, shredded cheeses, cooked beans. Frozen veggies and marked down reduced meats stay good for long while.
Buy family pack and separate 2-3 pieces of meats into separate baggies, place all in larger baggie and mark with permanent pen.
Leftovers make best TV dinners or lunches at work. Add fruit & yogurt for balanced nutrition. Homemade has a lot less salt and actually contains meats and veggies. Most of the manufactured TV dinners are all rice or pasta with little nutritional value.