1. switched to belly putter. Sets the pendulum at a fixed point, eliminating some error.
2. practiced a ton. I spent 6 months practicing nothing but puts (this is also inexpensive)
3. learned that putting is 95% mental/feel 5% technique-just look at all the different styles by great putters.
4. Read and reread Tom Watson's getting up and down
5. Learned to trust and commit to the line
6. Visualize the ball going in the hole many, many times before hitting the putt.
7. Speed is more important than line. With practice, our eyes and brains get very good at optical triangulation. Learn the correct speed. Your line is probably pretty good already.
8. Be positive all the time on the golf course (and in life). Be happy, make jokes, etc.
9. When you have a long putt, allow for a little more break. Trust your line
10. always look at the putt from behind the ball, lowest point on the intended path, and behind the hole. Time allowing, of course