"Never buy prepackaged frozen meals" is one of the most important rules of frugal cooking. Why pay a huge markup in the freezer aisle when you can make your own frozen meals for a fraction of the cost? You can stock up on cheap meats and vegetables and set aside time to cook and freeze in bulk, or simply make extra whenever you prepare a meal and then freeze the leftovers. Like many of our tips, this one takes a bit of preparation at the outset, but it will save you big bucks (and time) in the long run. And if you can afford to invest in a chest freezer, you can keep a lot of meals on hand and ready to reheat at a moment's notice.