Allowing your PC to get some shut-eye when it's not in use can chalk up significant environmental and financial savings. In the computer and monitor models recently tested by Consumer Reports, putting your computer to sleep for 12 hours out of 24 would save about 576 pounds of carbon dioxide per year, or around $44 in dough. Turning off the computer would save even more, of course, although new PCs made within the last three years use very little energy in sleep/standby mode.
Monitors and displays, on average, draw twice as much power as your CPU does when left on (yes, even with that flashy screen saver you stitched together from your vacation photos), so configure your power-management options to put your PC and monitor into sleep mode after a certain period of inactivity. Still, hitting the off button is your best bet-a couple of clicks is all it takes to do your part for the planet.
Difficulty level: Easy