Originally Posted by Poker Orifice
I would suggest reading > Phil Gordon's "Little Green Book". There's a good chance you'll be able to pick it up from your local library (if not, you might be able to order it at your library as an 'inter-library book loan').
Look for articles like "10 top mistakes beginning players make" (< stuff like this)
^^This. That was the first poker book I read and I had so many "Aha!" moments during it's ridiculous.
I can also recommend reading the Golden Archive here at the forums. It has a lot of very, very good threads:
WA/WB Concept (http://www.cardschat.com/f49/wa-wb-concept-76525/)
Analyzing Your Own Hands (http://www.cardschat.com/f49/guide-analyzing-your-own-hands-long-171059/)
Tourney Stack sizes (http://www.cardschat.com/f49/stt-bubble-stack-sizes-177963/)
Some more on analyzing your play (Tournaments) (http://www.cardschat.com/f49/analyzing-your-tournament-play-using-pokertracker-82641/)