You don’t own a skill until you can pull it off on a sleepy, distracted, off day.

Everybody can do the thing when conditions are good. Ownership is about the floor rather than the ceiling, because the days that count are often the ones where you slept badly and the room is loud. A skill that only works when you feel sharp is still a guest in your hands. Reliability is what you are actually building, and it arrives later than the first success.

Practise once this week in bad conditions on purpose: tired, noisy, cold, rushed. Expect it to be worse than usual and do it anyway, because that version is the one you will need. Note what fell apart first and work on that part.