If you play online, be careful. My brother works for an online gaming company which in the first 3 months of having Texas Holdem had over $34 million in bets run through their site. He's told me that there are people out there who have designed programs to run in the site that monitor and record players moves. The program will run over months and months and record frequent players moves which will over time learn how a person plays. Once they have this information, the person will log into a game and try to hustle you. Their program will tell them what your most likely move will be. If you play frequently, change your screen name as often as possible.