Putting has usually been a strength of my game. Recently I started to struggle with my putting, for roughly about 2 weeks...which was frustrating because I started hitting the ball really well. Finally figured it out and of course I struggled a tad with my ballstriking, but had 25 putts on some beat up greens.
The main thing I did was re-check my fundamentals. Particularly my aim. I have a laser alignment aid called (LPAS) which is really great and when I used it, I found that I was aimed slightly right but had a lot of forward shaft lean at address which, IMO, throws off the loft and the putting stroke. Living now in Atlanta, de-lofting the putterhead isn't very advisable given that you're putting on bermuda greens. So I recommend getting the LPAS (it's only like $40) because face angle is so critical in putting. D-plane is alive and well when it comes to rolling the rock.
From there, there's been studies that show that people who are aiming right tend to alter their path to get the ball to the hole. Conversely, people who aim left of the target tend to alter the face angle to get the ball to the hole. So with me aiming right, I knew my tendency was indeed to take it too far outside and close the face a little to get the ball going towards the hole. It's actually not very noticeable at all, even when I closely looked at videotape of my putting stroke.
But eventually I got it down and I'm back to my normal good putting self. Now, I just need to regain my ballstriking. Of course, that's what makes the game so difficult, yet fun to play.
I will also say that the other thing that gets me into trouble occasionally with my putting is that I tend to get too much right hand involved in the stroke. For me, I putt best when I take it back with my left arm and then left the gravity and centrifigul force do the work on the thru stroke. When I start using my right hand too much then I start hitting putts more towards the toe and struggle with delivery speed/touch. But often times I find that using too much right hand stems from poor alignment. Why that happens I'm not really sure.
3JACK