Don't let your house warming contribute to global warming. Turning the thermostat down just a little in winter can significantly cut your daily energy use. For example, for every degree you drop on the thermostat, you can lower your energy use and costs by 2%. A programmable thermostat is another great way to save energy. It basically does the work for you-making sure that you're comfortable when you're home and not wasting energy (by heating an empty house) when you're away. Programmable thermostats cost between $40 and $150, but they'll pay for themselves in about a year when used correctly. This winter, reduce your footprint by lowering or programming your thermostat.