Turn your computers off at night

Your computer uses power whether you're using it or not. Instead of leaving it in standby or sleep mode, you can save 40 watt-hours per day by turning it completely off. That adds up to 4 cents a day, or about $14 per year. If you don't want to wait for your computer to start up, set it to turn on automatically a few minutes before you start to work, turn it on and then do something else like tidy your desk. [PC World- Energy]