Actually, freezing portions helps with controlling what you eat. It's the premise of most of those expensive diet plans that make you eat their food.
The best way to do it is not to just package up the leftovers from dinner (you can do that too, but if you wait for leftovers, you're more prone to overeat when the food is fresh). Instead, spend an afternoon cooking when it's NOT a meal time, and with the purpose of making your own single-serving meals. Cook up the food, put it in containers and straight to the freezer. Save one serving of something for dinner. Those TV dinners sold in the freezer section are really very expensive for what is in them.
I was thinking of something other than TV dinners, though, when you described "microwaveable packaged meals," though. SOME of the frozen TV dinners aren't that bad in terms of ingredients. Usually the big hazard is the sodium or fat content, not so much strange chemicals in the frozen ones. There are things in the canned food section that can be microwaved too, and they tend to have a lot more preservatives in them.
Think about what most TV dinners contain, though. Some sort of meat, like turkey, or chicken, or ground beef (salisbury steak or meatloaf), plus a fairly sugary vegetable like corn or peas, and mashed potatoes. You could roast up a chicken or meatloaf on the weekend, get a bag of frozen vegetables for the week (better to buy fresh, but frozen is okay if you don't find what you want in fresh), and make a big batch of mashed potatoes. Frozen vegetables with a little water added cook up quickly in a microwave, then just reheat the meat and potatoes. You know exactly how much butter or salt you've added that way. When you cook up your meat and potatoes, you can divide it right away into single meal containers. If you're a little hungrier one night, make some extra vegetable.