When you embrace your worst game then all is better. Go to your match prepared to be helpless, disconnected, incompetent, off balance, nervous, and frustrated. Be prepared to work your tail off and come short. Be prepared to face ugly layouts and fall short. If you can accept that then you're in good shape. You have nothing left to fear, no image to protect, and you can just go about your business of trying hard and enjoying the challenge.
Guess what? If you do that session after session the good sessions will come. You don't deserve it. You can't bottle it. But you will have your time in the sun.
I hear some of you now. "You need to be confident!" "You get what you expect!" "Fake it until you make it!" Yeah right. I AM confident. I am confident in my PROCESSES, confident that I will try my best on every shot, keep my attitude positive. But we don't control outcomes and trying to control something we can't leads to frustration and fear. And expectations are all ego driven result thinking. No good. CJ Wiley had a great post a few months ago about how he visualized having lost every match before he played it. This is perfect. It's about SURRENDER. You surrender control and then give it your all.
The simple fact is there is no approach that leads to consistent quality play. The best approach is to accept it, do the best every session you can, and enjoy the good and the bad. When you play to have fun you win as soon as you put your cue together. You will give yourself the most opportunities to play great by not choking your game, and you will enjoy the whole journey more as well.