I’ve worked with a lot of Tour professionals over the years and they all use preview strokes. When dollars and self-esteem are on the line on every putt you go with any performance edge you can find. Believe me a preview stroke is a big one.
You don’t have to be perfect but you can’t do any of the important things badly. My advice? Believe in yourself. Becoming a great putter isn’t easy but it’s possible (Phil Mickelson at age 48 is enjoying the finest putting season in his career). Maintain a good hardworking attitude as you work through items 1 through 9. I’ve seen success stories happen thousands of times. Everyone is capable of improving.
It’s the same series of steps I followed for the putt in the photo at above right—a 25-foot downhiller on the seventh green at Shinnecock Hills. I read four feet of break from right to left. As such I aimed four feet right of the hole. After making a few practice strokes to dial in the correct speed I putted.