Bake something. Or make soup from scratch. Nothing like running the stove or oven for a few hours to warm the place up a bit and thaw yourself out. Besides, it smells good and you have a tasty meal at the end of it. If at the computer, place a heating pad on your legs and rest your hands on it regularly. You can use it as a wrist-rest also, but be very careful - too much constant pressure can lead to burns. A better method for a wrist-rest is a hot-water bottle, if you have one, or a towel that's been put in the dryer for a few minutes on high. Yes, I feel cold a lot. :)