I am dressing up and going out to collect cans for charity.
I, however, won't be doing anything. I dislike halloween - I'm not going to go out of my way to buy sweets for the very same children who tip over my wheelie-bin and generally run riot around my neighbourhood.
Stayed home, had a couple friends over, and played Republic Commando and had Nerf Wars all night.
(We also watched The Incredible Hulk, which isnt scary at all I know, but I'd never seen it before then)