I don't like using character sheets when running LARPS. I feel they take away from some of the game for me. When I am forced to use a character sheet in a game I use what I call the Train Ticket form. Basically it's a standard piece of paper, printed and folded in half (see attachment). The skills and such are on the left side with the stats on the right, below the stats are the levels of insanity. If a character loses a sanity level, they punch out the lost level, leaving them with the new level.