Dun Dun Dunnnnnnnnnnnn!
Sometimes it's called phantom power, but it's a very real thing that wastes millions of dollars each year.
At work, this could include items such as fans, desktop lamps, computers, phone chargers and space heaters. At home it might be your TV, toaster or Barney Rubble nightlight -- wait, that last one might be just me.
Anyway, if you've taken the LiveGreen pledge, hopefully you already unplug electrical items that aren't in use. If not, you can take the pledge and start doing so today.
Here is another link with a great idea on how to "unplug" with a flick of a switch. http://www.aspenpitkin.com/Portals/0/docs/City/GreenInitiatives/EnergyEfficiency/COA_phantom_loads.pdf