Some of you that have played golf and will understand when I say
that too much thinking can be bad for your game. You ever stand over your shot and you go through a series of checks to make sure your ready to swing. Everybody does! The better you get the less you will have to think about. What about practice swings? Do you take 1-3 practice swings before you hit?
Don't do it. You will focus better if you do not take a practice swing.
When approaching your next shot, pratice thinking only about the last good shot you hit and smile about it and swing away.
You will be amazed how many more quality shots you will hit if you use positive visualization and don't take pratice swings.
A practice swing is OK as long as you don't ground your club.
P.S. Another tip is to ground your club behind your ball before swinging and slide it forward and back. Alot of golfers dangle their club behind their ball and then hit a poor shot. Never dangle because that will change the arc of your swing in way you couldn't imagine unless you saw the angle differences on a computer.

Your best golf days are days you are relaxed with no outside worries and
don't think about too much.