At a NSDG clinic Feldberg was telling us a long story of tournament where he couldn't hit a putt to save his life. In the end, the problem was going too fast. He stressed that the arm motion should be slow and steady; you only want to move fast when you 'release' the putter.
That little bit of advice helped me out BIG TIME.
They say we can throw far but they don't know how far we throw - Beach House