shortened version—more later
Putting: a particular way to putt, with two rather unusual aspects (it works for the author and should work for others):
For address, bend over as far as possible without causing long term back pain. Let the putter-arm system hang by gravity in such a way that the club head is on a vertical plane through the eyes. Keep the wrists fixed in relation to the arms. Keep the elbow angles fixed. Position the ball under the leading eye. Set the lie of the shaft so the club-arm unit hangs by gravity at the correct position. Keep the club head over the putting line during the stroke. Let your head turn with your torso (we know this is unusual, but it reduces the difficulty of the swing and concentrates the mind on the torso and shoulder area, and away from the neck. Brain power is wasted while keeping the head from turning). Watch the clubhead during the stroke (give it a try); your eyes should move a little in their sockets to do this, (if you are using shoulder movement to swing the club, as is normal). Watching the clubhead during the stroke will provide cues to your nervous system and keep the stroke smooth. It also shows you the direction and length of your stroke, which is a continuous monitoring that can only improve your stroke. Practice aiming and stroking separately, then together.
Use the same brand of ball on a regular basis, or use different brands of balls tested for bounce height so they all bounce to the same height. Test balls by dropping them (the reference ball and the tested ball next to each other) on the same spot on the same floor from the same height. Keep a reference ball for this purpose.
Swinging: We point out something missing from most swing technique.
1. Our little “secret:” Let your body move forward on the backswing and then backward on the downswing. I would to call this “Sway Theory” or “Counter Balance Theory. (Forward means the direction you would go if you were to start walking straight ahead from the address position.) It is a natural reaction to swinging a club or any weight around you, and if you resist it you will be in a very difficult position. It will be hard to impossible to get back to hitting position by impact. Rory McIlroy and many allow this sway movement. You can see it on video here; the first example is about 35 seconds in, and another at one minute 40 seconds, among others. The head moves forward on the backswing, backward on the downswing, and forward again on the followthrough (very quickly on the downswing so it is a little hard to see).
2. Don’t “move off the ball” (to the trailing side) on the backswing. Moving to the trailing side again makes it very difficult to get back into the hitting position, requiring a lot of leg work and timing. If you don’t move off the ball, less physical effort and physical coordination is required, so the swing is more consistent. To learn to stay centered, put your feet together, then pose in various positions of the swing, keeping the weight on each foot the same.
3. Check to make sure that the backswing starts tangent to the target line.