Can you guess where Americans wasted $3 billion that could have been saved with a simple switch? Believe it or not, it's your cable TV box. These energy hogs consume more energy than most electronics put together, according to the Environmental Protection Agency. The good news is that newer cable box models are becoming much more energy-efficient. The bad news is that many of us are still stuck with the old-fashioned energy hog kinds. To cut the waste, plug your cable box into a surge protector that has a "power off" switch on it. Before you go to sleep each night, turn it off with the flip of a switch. In the morning, turn it on. You'll save hundreds of dollars a year with this one simple move.