Do you rely on a trigger that helps to start your swing? Most of us do, as it's hard to move away from the ball and set things in motion without having something that will start off your swing. How often have you watched a golfer take a few beautiful practice swings before approaching the ball, then tenses up, and freezes for a while before executing a stiff, jerky swing that looks nothing like their practice swings.
A golfer's body understands what it takes to hit a ball properly, however, when it comes to actually doing it something lodged between the ears takes over and messes everything up. Top players are not immune to pre-shot tension, and many have incorporated something that enables a consistent movement away from the ball that kick starts a motion that sends the ball in the general direction of the hole.
Pre-shot routines are important and recommended by coaches. A starting switch could be a noticeable forward press or swinging back slowly a few inches and back to the ball again before earnestly initiating the wind up away from the ball. It's the final step before taking a swing or hitting a putt and prevents tension creeping into your swing.
Starting your swing from a point of slight movement even -- if it's barely noticeable, is preferable to several seconds of no movement at all, as it will help you release tension paralysis and allow you to swing your club away smoothly.
Out of Bounds: One out of four people in the world is mentally unbalanced. Think of your three close golfing partners, if they seem OK, then you're the one.