Here's a tip to cut down your winter power bill. Set your house to 68 degrees during the day and turn it down when you're going to bed. If you're leaving the house, turn it down to 55 degrees. For every degree you lower your heat, you'll save three percent in energy costs.
Or better yet, as Professor Robert Farr explains, you could install a programmable thermostat:
On top of the energy savings, there's a global warming benefit. By one estimate, every home that monitors its thermostat can cut its household greenhouse gas emissions 300 pounds annually!