Ever want to do your own home energy audit? Energy costs are moving on up like The Jeffersons, so it might be a good idea to investigate what's sucking up all the juice around the home.
The Kill A Watt is a plug-in unit with a large LCD display which gives you info about whatever is plugged into through it, such as electrical use by the day, week, month, or the entire year. The unit also provides info about the power by monitoring voltage, line frequency, and power factor and claims to be accurate within 0.2%. Not a bad investment for $19.99 considering you could save a lot more using the device to find energy vampires around the home.