Its Sampras verses Agassi in center court today. What makes one tennis player better then another top tennis player? Not much. Like you who have all the skills required to play the game of poker. What keeps you at the levels that you are right now? Sampras and Agassi hit the ball back and forth. Waiting for that critical moment. They try to outplay each other to no avail. They hit the ball to the back of the court only to be retrieved by their opponent. They hit it to the side of the court only for the ball to be returned. Now a drop shot only to be dug out and returned. They hit the ball with deception but still the ball keeps coming back. Then comes the critical moment. The mistake. Mistakes can cost you a point, a set and a match it depends on how many are made and when they are made. As in poker a mistake can cost you a half bet a whole bet and the pot. Losing half bets will hurt, whole bets make you play hours on end while not making money and mistakes in big pots make you play days for nothing. Take a look at these mistakes made by you or your opponents. Look for their weaknesses as well a yours. Roll them around in your mind. Memorize them. Try not to make them. Think deep and hard the way David Sklansky did when he thought of them and maybe tonight you may not sleep under a bridge.

Checking when you should bet.
Calling when you should raise.
Folding when you should call.
Folding when you should raise.
Raising when you should call.
Raising when you should fold.