Immediately.
Every student I’ve ever taught had the inclination to leave a concert and focus on the things they could improve. The mistakes, the shortcomings.
It’s not our fault that we’re this way. Because we spend every minute of rehearsal focusing on exactly those things. We practice recognizing errors.
And the end result is that we performers, as a whole, take little time to celebrate what we did right, and can spend years revisiting the mistakes we made. Like that time my tap shoe fell off in the middle of a performance…or 100 others.
But I’ve come around to this. If I intentionally celebrate the successes and forgive the shortcomings – in myself and in those I’m working alongside – then I am more motivated to get back to work. Feeling joy in performance makes it more fun and more repeatable.
So I train my brain to focus on the positives, and let the negatives drift away.