The first couple of minutes I play, I am kinda out of tune and off rhythm. I felt bad about this until I realized that I could notice a similar thing with my teacher. Is this true of you? How can you short circuit this so you're immediately 'on'? On the other hand, this is one of the joys of live music (IMO) - seeing guys go from cold to hot, or feeling the same thing in yourself. Any ideas on this? Does this feed the dynamic of improvisation in some weird way?