I understand the philosophy here, but no high level ref I want to emulate gives a preliminary signal on every foul. There are fouls that demand a preliminary like a block/charge decision, hand checks, and holds. Most other obvious fouls like hits and pushes I signal while reporting.

My mechanics tip is to look at the clock whenever possible. Made sure it runs after every chop, note the time when starting a back court count, and made sure it stops on every whistle.