Read all the strategy articles provided by this forum and also read the posts provided by members in various threads. Learn the differences in the games (cash games, sit n gos, tournaments, satellites). Wikipedia also contains a lot of information on each game. For books, Mike Caro and Dan Harrington have excellent reviews. Don't know if it's still available but a Poker CD endorsed by T.J. Cloutier contains a lot of tips, scenarios, and tests for all levels of players.