Halloween Help

I've never been much into Halloween, even as a child. I love candy and all, but getting dressed up and hoofing about the neighborhood just didn't appeal to me. I stopped dressing up years ago. This year, for the first time in a long time, I have a Halloween party to go to and I need a costume. I've had one good costume idea in my life (I was a calendar one year) and that's about it, so I'm at a bit of a loss. Anyone have any creative suggestions?