Write out a schedule.
Write out a schedule to organize your practice time. And follow it every day (especially when you don’t want to). A schedule is like a blueprint for building a house, or some instructions for building a toy plane. Have you ever built toy models or anything like that? You know you’ll have a hard time bilding a toy plane without directions. Practicing is the same, you need to have some instrucitons. That’s what your schedule gives you, it lets you know what you have to do, and when.
Wynton Marsalis, from “Marsalis on Music” p. 124