I've often thought that a "Performer's Workshop" would be a good idea. Until, that is, I stumbled upon a book which was being promoted on one of these threads. While the book was receiving rave reviews from all, I was, on the other hand, in total disagreement with what most of the author said.
The learning process is a rough one and we can try to smoothe the way but ultimately, the artist has to plough his own furrow, I'm afraid.