Often I wonder if there is a way to predict and bring about- through preparation- a successful performance. But the older I get the more I feel it’s not possible. Why? Well, tell me truthfully whether you have had one of these experiences: 1. You were well rehearsed but played worse than you usually do2. You were well rehearsed but not spontaneous3. You didn’t practice at all and played great4. You did a lot of practicing and played very well and felt practicing paid off.5. You were not prepared at all and played like shit6. You were really looking forward to playing but then it was a disaster7. You were…