Practice is problem-solving, not rep-grinding — and how you practice matters far more than how long. The central idea: every exercise in this course is a template you vary (key, strings, rhythm, articulation, contour, tempo, starting point) into thousands of brain-challenging versions. You'll learn to practice with a plan tied to the four levels, use interleaving to stay off autopilot, protect breaks and sleep (where learning actually consolidates), record yourself for honest feedback, and run the deliberate-practice loop: identify → fix → test → lock in.