I’m not going to tell you how you should prepare for a start. That’s for you to decide. Pitchers’ routines are as different as their throwing motions. I encourage you to find what works for YOU, and stick to it.
What I will do, is outline the different phases of a starting pitcher’s pregame routine and give you a few SUGGESTIONS on how to maximize each one.
End of Last Start
Preparation for your next start begins directly after your last. Whether you had a good outing or a bad one, process it and move on. Reflect on your successes and failures briefly, taking with you only positive thoughts and constructive critiques to work on. Discard the rest.