Thanks to reader Elicia V. for this Green Tip: Give your computer a Rest. Did you know computer's in "standby" mode consume almost as much energy as when they are in active use? In fact, a computer running 24 hours a day uses more power than an energy-efficient refrigerator. So turn it off. You'll save electricity, money and system wear (continuous run-time is actually harder on PC components than shutdowns and start-ups).