OK, first, this is going to be brief this AM because I am playing Menifee Lakes with BallTurf this morning, and that HAS to take precedence
The first thing you need to do is find a putter that LOOKS right when you are standing over the ball. There is no substitute for believing you are lined up correctly. If the putter doesn't fit your eye, then you will subconsciously make corrections in your putting stroke and miss the putts.
FWIW I NEVER worry about my putting stroke looking "correct" I worry about whether or not the ball starts on line at the proper speed.
Here are the keys. First, if you are right handed, about 25% of all the nerve endings in your body above the waist are in that fleshy pad next to the life line in your right hand. The only thing that makes sense therefore is to putt with your lifeline on the putter. Claw and cross hand, and all of that, are for people who have had their brains played with too much
The feel for distance is the most important aspect of long putting. If you really pay attention most three putts come from hitting the ball the wrong distance on your first putt than anything else. Don't get so hung up on the line of a long putt that you forget to hit it close to the hole. Therefore, practice 30-40 foot putts and try to make them finish within 3 feet of the hole. Leaving yourself 6-8 footers all day long is no way to get to heaven.
The key to great putting is acceleration through the ball. ONLY that will keep the ball on line. You miss short putts because you decelerate the putter, either by looking up, or by simply quitting on it while trying to guide it into the hole. WISHING The ball into the hole is not the same as WILLING it into the hole.
Your backswing should be no more than half your follow-through on ANY putt you hit, I don't care if it is from 3 inches or 50 feet. You MUST accelerate your putter through the ball, ON the line you want the putt to start on.
Here is how you learn to do this.
Start 2 feet from the hole. Place your putter directly behind the ball. Do NOT take a backswing. PUSH the ball into the hole with the putter. This will require a piston like motion with the right arm (Nicklaus used this motion). There are NO wrists involved in this stroke, nor are you rocking with your shoulders. Think of a steam locomotive and the drive wheels and how the pistons move back and forth. That is the motion you want. I don't care if you stand open, closed, or square, whether you play the ball forward, back or center, you MUST be comfortable over the ball. Take a stance that feels GOOD to you. Do this exercise 20 times, then move back to 3 feet and do it 20 more times. This will get your hands and brain used to accelerating through the ball. Then hit 10-20 three foot putts.
Remember ANY putt under 6' in length you never see go in the hole, you only HEAR it, because you are watching the place where the ball WAS, not where it's going.
So, having done this drill with a putter that fits you, what do you practice next? I never practice putts other than 3' and 30+' long. Why? because the pros (and you can putt as well as they do) make about 99% of their 3 footers. However, they only make slightly more that 52% of 6 footers and less than 25 % of 10 footers. WHY PRACTICE MISSING?
Most of putting is believing the ball is going in the hole,and the rest is keeping your head still and accelerating through the putt. I am GENUINELY surprised when any putt I hit doesn't fall. But I am NOT UPSET by it. Even a 3' putt is subject to a certain level of luck. If you hit enough 6' putts some of them will fall. If you hit enough 30' putts, a couple will go in, but the point is to be present in the process, not the result.
The other drill that I use is the following. I will putt to a tee stuck in the green rather than a hole. This sharpens your focus and makes you concentrate more. I will place a tee in the ground where there is some undulation to the green, and get back 30 feet or so and try to 2 putt from there. When you are standing over a 3 footer and trying to hit the tee instead of that HUGE hole, it really helps sharpen your focus. Then, when you are faced with a tricky short putt to save par, and there is a tendency to get out of focus, I "see" a tee next to the hole on the line that I want to putt and putt to the tee. It may be in the center of the front edge of the cup for a straight putt, or 5 inches outside left, or whatever, but I visualize a tee there and putt to it. Your accuracy will improve and you will have less tendency to start short putts off line.
I am re-learning how to apply the same philosophy to the rest of my game......
I will try, when my girlfriend gets out here, to take a video of what I am talking about and post it for everyone.
Anyway, hope this helps. Remember, as Yogi Berra said about hitting a baseball, and it applies to putting "(90% of this is 80% mental)
Play well,
Obi WunPutt