Saw this blog post through Hacker News. Basically, the way to be better is to stop doing stupid ... stuff. (I decline to curse.) He started in chess, and the stupid stuff he was dealing with was falling for stupid tactics. He then adapted it to piano. There's short shrift given to the specific stupidities he was falling for, because he was hurrying to get to the application in a developer context.
I suppose, then, that each person has their own stupidities to deal with, and identifying them is the first step.