I'm a brand new member. Since it seems that I can't post in the "Reading Room", I am going to try this forum. I hope that doesn't annoy anyone.
Around 1987 or 1988, I read a book about how to occupy your mind during the swing. It advised thinking "start" at the moment that you begin your swing. Then think "top" when you get to the top. Then think "hit" at the moment that you hit the ball.
The author discussed the functions of the two hemispheres in the brain. He/she said that silently thinking about these words at generally the appropriate time was sufficient to occupy the analytical side of the brain. Thus occupied, the other hemisphere is free to do what it knows how to do (make a good swing).
Anyways, I cannot for the life of me recall the name of this book nor the name of the author. I've googled this to death and it's driving me out of my mind (double pun intended... driving... mind... sorry!)