No kidding there, and more than once it has bitten me. Spend enough time eating restaurant meals, and a sane portion size soon seems way too small, unless you're disciplined enough to chop your portions in half and bring the rest home.

Pay-by-the-weight buffets (as opposed to all-you-can-eat) seem to offer me the best way to control portions and get a variety of healthy things to eat without the prep hassle, but it still costs a good deal more than it does for me to make my own meals.