Practice Makes Myelin . . .
. . .so practice carefully! Understanding the role of myelin means not only understanding why QUANTITY of practice is important to improving your skill (as it takes repetition of the same nerve impulses again and again. Practicing skills over time causes those neural pathways to work better in unison via myelination. To improve your performance, you need to practice FREQUENTLY, and get lots of feedback so you practice CORRECTLY and enhance the right things.