Dial it down. Moving your thermostat down just 2 degrees in winter and up 2 degrees in summer could save about 2,000 pounds of carbon dioxide per year.

Many idle electronics—TVs, DVD players, stereos, microwaves—use energy even when switched off to keep display clocks lit and remote controls working. Switch off power strips and unplug electrical devices when you're not using them.

Improperly sealed or caulked windows can account for up to 25% of total heat loss from a house.

Screensavers don't use less energy. "Sleep mode" reduces a computer's energy consumption by 60 to 70%. At the end of the day, power it off completely.