Nifty Reffing Technique

I was emailing Larry a moment ago, and I thought of a great randomization device.<br /><br />Have the players roll a set of d100s at the beginning of each game session.  Number the results (1 to 10 or whatever) and then whenever a secret check needs to be made, you just check the number rolled at the beginning of the session.  Then cross out that result so it does not get picked again, and continue.<br /><br />That way, if the person needs an INT check to see the blaster poking out of the dung pile, you can make that check and not physically (or electronically) roll the dice, which sometimes makes PCs suspicious.