If you're playing 2400 online, I recommend using this Google Docs character keeper. Character keepers are effectively shared character sheets that help you track everybody's characters on one screen. The format's useful to GMs looking to suggest dilemmas and opportunities to players based on what they can do, and it's also handy for players in games with items that might change hands. This keeper includes a tab for safety options, copied from Lowell Francis's #iHunt character keeper.