One thing that I have been exposed to are the amount of web sites and books that claim that they can help you improve how you win at poker. Most of them are scams and are only set up to take you money.
But I have found a web site that seems to be on the level. They are called Poker Strategy and they have lots of information on their web site on how to improve your game.
One feature that I particularly like on their web site is their Poker Videos. These are actually videos that will contain useful tips and also interviews and stuff with pro poker players.
If you are looking for some tips then why not check out this free resource.