If you have a stronger play available, biding time by counting is a terrible, terrible idea.  What a horrible shame to get thrown out (or draw heat) for counting and leave behind the stronger play!  I can't think of a circumstance where it would be a good idea.
If you can't look natural doing nothing, I'd suggest some slow, intermittent, low-mid-stakes play nearby while you wait for your opportunity.  You can (likely) afford the short time of -EV.  But there should be plenty of ways to look natural while waiting.