I am looking for some ideas as to a good warm-up, practice, and warm-down that will help build my upper register, I can currently play an E above the C above staff solid, but the F is squeaky. I have talked to a trumpet player names Jari Vallanueva, and he recommended Max Schlossberg's 'Daily Drills & Technical Studies for trumpet. I was also hoping for some other exercises that will build my upper register, yet help not affect my lower register.
P.S. Right now I am a freshman in high school if that makes a difference.