In need of a trick

[doubleringer]

I'm looking for a trick to help me out. I work about a half varsity, half small college basketball. A couple of times a year I find myself dropping the number of a player committing the foul. I did it the other night in a blow out game (the only person in the gym that knows I dropped it was me and maybe the kid that got charged with the foul, but he didn't say anything). I need a trick to help me make sure I don't lose numbers again. Anyone got anythinig useful? I'm not looking for suggestions on what to do when it happens, I know I can go to my partners, players (women's college encourages this) and the bench officials. I'm just looking for something I can do in my head to make sure I quit dropping numbers.