NTGson is 2016 (LHP going D1 next fall). I don't know his routine on-field. I do know that the advice given us, his parents, 7 years ago by a wonderfully grizzled coach who works with him: "Don't talk to the boy 'bout pitching tonight. Make sure he knows you love him, that you will be there to see him on the mound and wish him luck. Anythin' else just clutters his brain up."
That's been tough for me as a 'wannabe' coach, but it has worked since he first took the mound as an 11 year old. His routine is what he and his coaches have decided it will be. The only place where we chime in is on issue of pitch counts: per inning and per game. That's done with the coaches away from the field and long before any game.