Vampire voltage may sound like the next Sci-Fi channel original movie, but it's not. It's something that lives in your very home and can be affecting your energy bill even as you read this. Basically vampire voltage is an appliance that is using electricty although it's not being used. Computers, microwaves, blu-ray disk players, etc are examples of vampires.
This tutorial from ConEdison in New York, will give you some tips on how to be wary of vampire voltage and what you can do to save yourself a whole lot of green. Good luck and enjoy!