We all have those days ... weeks ... when things are not just going our way. At least I have. There are days when my fingers just slip, I make mistakes where I never use to make mistakes otherwise, the whole piece feels clumsy like a turkey trying to fly. Then I shift to something easier ... even easier ... and to my desperation I find that I cannot play ANYTHING.
Here I must a) calm down for a moment, and remember what I just wrote above. One of these days, and this too shall pass and b) praise myself for ... well, I need to find SOMETHING, could be just anything, that I can praise myself for. I went to the piano and practiced for a while, that is good! I can play this chord and that chord nicely, that is also good! Actually I worked with a certain problem in a certain bar and I DID improve a bit, so that was good.
Don't underestimate the power of this simple little method. I have found that this is the real key to success. Focus on your successful moments, no matter how modest they seem at the moment, and ignore your present failures.
note that "ignore your failures" does not mean you should not work with things you need to improve. But you must work in the mood of a winner, or you will just make it worse. Self-reproaches are most dangerous!
So ... take a deep breath, focus on what you did good, even if you have to go down to note-by-note-level, and when you feel better about yourself you start working with a detail so small that you can avoid making improvements. And be sure you will do better tomorrow.
r them - something I already knew they would want. I played, and I was amazed how good it went.