There are two ways you can achieve lower scores;  you can play to your highest potential or you can raise your capabilities.  This will cover the art of bringing out the best in what you are currently capable of doing.  The pre-shot routine is the easiest way to lower your scores without dealing with physical abilities. 
There are many parts of the pre-shot routine that we can talk about, like reading the lie, or planning the shot and choosing the club to hit.  We are going to cover the execution phase of the pre-shot routine which begins after you have completed every other phase.  Essentially, you’ve already decided the club you will hit, the swing to use, the shot shape, starting direction and landing point.  Now it’s just time to make it all happen!

So much easier to type that than to actually do it because of our brain trying to get in the way and screw up your well thought out plan!  So we need something to keep you mind and body connected to the present moment…. Meaning that we aren’t thinking about the money you could win if you make the putt or about the last bad drive we hit.  These are great examples of focusing on the future or the past which creates tension and poor motions.  We need to keep ourselves busy with a goal that’s a little more abstract than ‘hitting the green’ or ‘make the putt’.  Please keep your focus and goals centered around the physical and mental execution routines.

You need to know exactly where and when you place each foot.  How many times will you look at the hole?  One or two practice strokes?  No practice strokes?  So that covers the physical but we must also make sure the mind is solidly rooted in the present as even focusing on ‘nothing’ is just allowing for something to creep into your brain!
Please check out the video below for a more specific example of what you need to do to unlock your potential.