A mentor of mine had me start doing this years ago, thought maybe I'd share. Personally, I chose Trading In The Zone & Its not what you think, Its how you think.
My morning routine is the most important as it starts my day off on the right foot. I read a chapter out of each book to reinforce the idea, that, trading is a game of odds and probabilities. Edge and risk management. One trader after another. They are all the same. Some work out and some don't.
I also read out loud my personal affirmations and goals that I have set. Focus. Focus. Focus.
Just Fucking Do It.