As simple as this sounds, it can be a rather controversial subject. Do you turn your computer off at night, when it's not in use? It saves energy, but some people argue it's not good for the computer.
Umbra over at Grist says to go ahead and turn that computer off—the argument that it's bad for the computer has been kicked to the curb by the US Department of Energy. Do you agree? Disagree?
If you can't bring yourself to shut it down all the way, most computers now come with a hibernation mode, so you could use that instead. It's almost as good.
Do you turn your computer off at night?