What kind of CBT techniques exist for athletic performance

I do sport that I hope to compete one day. I wanted to know what CBT techniques are there for enhancement of physical performance.

Some background about me. I used to be very lazy in the past, and very spoiled as a young child. My parents rewarded me for nothing almost always. I became depended on them. I have done very few difficult things in my life, and I had low self-control. I changed for the better as I grew up. But elements of the past still persist in my head today. I still have a sweet tooth and I like quick fixes instead of looking for the optimal solution.

What I practice today is collecting 10 motivatonal quotes daily from the internet and sometimes teaching others about them and other psychological perceptions.
Examples of a few quotes that I collected:
- "Kill them with success and bury them with smile"
- "There is no elevator to success, you need to take the stairs."
- "Ambition is the path to success. Persistence is the vehicle you arrive in."

For my sport NLP, meditation, visualization, positive affirmations to manipulate the subconscious, are too weak to perform. I like collecting and memorizing my quotes. I will keep doing so until I reach 1000 quotes.

I thought to ask you, is my method of changing my belief system is effective..and what other CBT techniques are there to help me?

I like the cognitive perspective more than other perspectives in psychology. I used to work as a programmer and a hacker.. and I am used to see the analogy between a computer and our brain. A computer iterates over lines of code and our brain iterates over thoughts. If I could modify the perceptions behind those thoughts, I would change the results that those iterations give at the end..and hence my final behavior.

What do you think?