I don't do much for Halloween. When I worked at Hofstra I wore a Superman t-shirt under my usual shirt, tie, and glasses. We don't get many trick-or-treaters on my block. (Last year we had one.) If we didn't have M&M snack packs, I'd be giving out Fiber One Chocolate N' Oat bars tonight ("35% of your daily fiber needs, kids.").
UPDATE (5:50 PM): Our first trick-or-treaters of the night were two dimunitive Jasons Voorhees.