I turn off my computer when it is not in use, and even turn it off at the mains if not being used for long periods of time and at night. This saves a good amount of electricity as the machine still use some even when swtiched off.
Hibernation is a cool way of storing where you are without leaving the computer on, it does not use any electric as it saves the way your computer is before it shuts down, so even if you turn it off at the plug it will still come back up where you left off.
More people should do this. Also turning off your screen is a good power saving if you are away from the computer for a short period of time and do not wish to turn it off.
Let spread the pc eco ways.
Footprint joe90 