Mass limit for encumbrance. Which is Str + End + any Athletics in kg, so the base info is all on the sheet, but why stop to figure it out each time? Plus actual mass totals for common loadouts (in armor, out of armor, with or without all your tookits and biggest guns, so usually there are two or more).
Original stat rolls, before they're raised and lowered by events in creation.
Actual unskilled modifier, after any Jack of all Trades, and after house rules. (Last time out I set unskilled modifier as equal to highest single skill rank rather than flat -3, for PCs only. At a meta-game level I like it, but simulationists get hung up on it.)
Stuff I haven't done yet, but will next time out:
A character sheet/record sheet specifically for character creation. So more room to track events and contacts, plus a column for stat damage even if immediately healed/bought off.
For the in play character sheet I'm going to put the task chain table modifiers directly on the character sheet so that info is player-facing. I might even house rule the task chain modifiers to be more favorable to the players while I'm at it, but not before seeing what range of skill modifiers the group actually rolls.