Watch Your Own Image

Paying attention to your own image is probably the most important image to pay attention to in a tournament. For example, suppose you've just been moved to a new table in a Texas hold ‘em tournament ten hands ago. In that time, you've been dealt AA, KK, and AK twice, played them all aggressively, and never showed down a hand. Everyone is going to be just itching to play against you, because you look like a maniac, even though you know you've just gotten an amazing run of cards. This effect will be there at any level of game, from a freeroll to a major tournament.

*This means two things: don't try to steal blinds with a junk hand, because you will get played back at. Also, if someone plays back at you when you have a tough choice, tend to call rather than fold. The odds they're reraising with air goes up dramatically because you look like a maniac.