The best advice is probably to c-bet when you actually hit something or if you figure your ace high is the strongest hand out there atm.

Too many people simply c-bet too often with nothing because they like being aggressive. Not only are you going to get cut to shreds by an observant TAG, even the fish might beat you.

Example:

You AQ, flop KJ2. Check.

You AK, flop 269. Bet.

You AT, flop TJ3. Bet.

T.