Put on a sweater. Seriously, there are many reasons why winter fashion magazines are filled with models wearing sweaters. Not only do they look great and camouflage any winter weight gain, sweaters keep you warm. Layering your clothes—say, a long-sleeve T-shirt under a mid-weight sweater topped by a fleece-lined jacket or vest—will keep you warm on the coldest days. As a bonus, wearing a sweater allows you to turn down the thermostat but still remain comfortable. In your quest for cozy warmth, you may also want to check out fleece-lined jeans and fuzzy wool socks.