The misconception is, a pre-shot routine is just a set of movements performed prior to playing every shot. The reality is, its so much more. A pre-shot routine is a mindful process of directing your focus to the shot at hand.
Once your routine starts, your movements are a result of your focus. You’re taking practice swings because you’re focused on feeling the shot. You’re behind the ball looking down your target line because you’re visualizing the shot. While you’re addressing the ball you take a couple looks at your target because you’re only thinking of where you’re going to hit it.
The real art of a pre-shot routine is being conscious of the process. The above are just examples but each element of your routine should be mindfully executed. Getting lackluster with your routine will produce lackluster results.