Purpose in Practice: 26 Rules for the Practicing Musician by Rachel Lee Hall
This book goes hand-in-hand with Purpose in Practice Journal, where each weekly practice tip from the journal is expanded into a more detailed chapter for further study. Together, these books create a six-month practicing experience. They may be used separately but are especially very effective when paired together. Written by a harpist, the Purpose in Practice books are especially applicable to harpists, although both may be used by any musician.