I like to go through hands with pokerstove after play adjusting villain's range after each decision he makes. I'm not good at it yet but I think it helps. It's really interesting, alot of times my equity is way off from what i thought, and usually I have a really good idea of what villain could have by showdown. It's also important to subdivide villain's range into sub-ranges that he plays differently, that helps us to pick the right line against him.

Also, check out these Galfond articles, especially 'G Bucks' and 'Wait, Weight.'