I have to agree with our Scottish friend - As with any skill practice is key - probably the most important thing you can do is keep shooting. But utilize the critique forum here and elsewhere because you need feedback to make adjustments as you learn and practice. Outside of that I would say spend as much time looking at "the classics" as possible. Learn the visual vocabularly of photography. Let me start you with the names of some of my favorites: Henri Cartier-Bresson, Edward Weston, and Sally Mann.
Good luck!
Matt
http://www.pittsburghfilmphotographer.com/