Kenny's Learning Diamond:

Note, that the top of the diamond says "Play Effortlessly". That's a constant along with any two of the other points.  More info on playing effortlessly here:

http://kennywerner.com/effortless-mastery

I highly recommend this book!!!!

Now, about the rest of that diamond:

Play Fast > Play the Entire Example (have to give up "Play Perfectly")

Play Perfectly > Play the Entire Example (give up "Play Fast"... in other words, play it as slowly as needed to not make mistakes).

Play Fast > Play Perfectly (perhaps give up playing it all the way through, work on a small portion until fluent/perfect).

Here's a list of Trumpet Method Books I like to use:

• Standard of Excellence - Bruce Pearson
• Mitchell on Trumpet Books 1-4 - Harold "Pappy" Mitchell
• First Book of Practical Studies for Cornet and Trumpet - Robert W. Getchell
• Arban's Complete Conservatory Method for Trumpet - JB Arban
• Easy Jazz Conception -- Trumpet: 15 Solo Etudes for Jazz Phrasing, Interpretation, and Improvisation - Jim Snidero

For theory:

• Standard Wirebound Manuscript Paper (Green Cover) - Hal Leonard
• Berklee Music Theory