Try to vary your playing style (this is a tip that can be used successfully in many card games, not just Texas Holdem). A predictable player might as well be playing all his cards where everybody can see them.

Always draw to the high end of a straight. If 7-8-9 flops, you should be playing J-10, not 6-5.

Study your opponents, since you are trying to beat them, not the deck. Keep an eye out for anybody breaking the rule at the top of this page.

Starting position is very important. It is always better to be in the position to act last in any round, since you will already know what your opponents are working towards. This is especially useful early in the game, since some starting hands work better against large groups of players.

Next - Early Position