Let practice be untidy enough to reveal what needs attention.

Practice that always goes well is usually practice arranged to go well. Staying inside what you can already do feels productive and produces almost nothing, because nothing surfaces that you did not already know. Mess is the useful part: the missed note, the failed rep, the drill that falls apart, all of it pointing at the thing you would otherwise keep not working on. Comfortable repetition preserves your ability; awkward repetition grows it.

Deliberately include something you are bad at in your next session and let it go badly. Keep note of where it broke rather than how it felt. Then spend the following session there.