Every great player has learned the two Cs: how to concentrate and how to maintain composure.
The only shots you can be sure of are those you've had already.
The only thing you should force in a golf swing is the club back in the bag.
No golfer ever gets so consistently good that he can't use some constructive advice. No matter how many trophies he may win, he can't analyze and remedy his own faults.
Golf is a lot like life. When you make a decision, stick with it.
The first step in building a solid, dependable attitude is to be realistic, not only about your inherent capabilities, but also about how well you are playing to those capabilities on any given day.