Some great books for further reading:

The Practice of Practice by Jonathan Harnum

First, Learn to Practice by Tom Heany

Practiceopedia: The Music Student's Illustrated Guide to Practicing by Philip Johnston

The Musician's Way: A Guide to Practice, Performance, and Wellness

The Inner Game of Music by Barry Green, W. Timothy Gallwey

Practicing with Purpose: An Indispensable Resource to Increase Musical Proficiency

Website: The Bulletproof Musician, bulletproofmusician.com