TIP
"Don't talk in someone's backswing."
-Mary (Cameron Diaz), There's Something About Mary

CUT!
OK, that's actually sound advice, but you can get away with mid-swing gamesmanship, says our mental-game consultant Richard Coop Ph.D.

TAKE TWO...
Put a spring in your step, like the "quick-steppers" on Tour who start walking in their rival's downswing, he says. "They do it once, and it's in the other guy's mind all day."