read everything you possibly can about the game. before accepting any of it as fact think about it alot and discuss it with other poker minds.

watch good players. try to understand everything they do. why would they call a push with 2nd pair? why was that a good spot to bluff? theres usually alot more levels of thinking with these actions than it appears at first. once you learn to think on all sorts of levels your game will grow leaps and bounds.