Well, we're back from Ice Week here in Dallas. Probably the next important thing in preparing for a single performance is deciding when you are going to end your development of your piece, your continuing exploration of a song, the research and development section of working on a song. At some point you need to decide to cut off doing the piece better and better (faster, higher) and work what you've got into confident, expressive excellence. Quit trying to hit that high note and change it to a note you can nail. Quit trying to play the elusive 2 measures of that solo and just change it to something you can play well. Quit trying to play it at 160 and play it at 145. Many people are working on perfecting a song until 10 minutes before performing. This is a pretty sure way to give a stilted performance. And with this cut off, decide exactly the form, key, verses, etc., so you know what you're working with. And this doesn't mean we're abandoning doing this piece at to it's ultimate potential, we'll come back and perfect it after this amazing performance.
A musician's growth is not steadily upward. It is more correctly: progress then consolidation, progress, consolidation.