I was just wanted to give my input on a book I'm currently reading, The Inner Game of Music. To give you an idea about what this book is so you don't think it is just a waste of money. The guy who speaks in this book is a musician who plays orechestral base, so there is a lot of base examples in it. But he also had the person who wrote the actual books that this one came off of, the Inner game of Tennis and Skiing so the co-writer. But he talks about how to get over your fears of auditions and solo performaces and possibly concerts if you get nervious at them. But he breaks it down into catigories, Self 1 and Self 2.

But he says, and I've experenced this for a few auditions i've recently done, and will do for this next week (such as all-state, all dictrict) is whenever your auditioning, not to let the little voices in your head to talk, another words make them shut up. If you acutally think about it, your trying to hard when you thinking about the music and trying to remember something by thinking of it instead of making music. But if you don't think of anything and only consertrate on the music, the notes, the automatic system in your head of tuning and all the other aspects, and not listen/listen to the voices in your head, than eventually you'll play increadbly better when your audition/playing in a concert. Either way, if you buy this book, than it will break what i just said down for you. In my opinion, this is a great book, and i know that it may not help everyone, but its a try.

It is truly a great book. Some people like "The Inner Game of Tennis" better. The concepts are the same, but I personally like that Tim Gallway brought a professional musician in on the project to better show how the concepts apply to a musical situation.
Another book to consider is Effortless Mastery by Kenny Werner, published by Aebersold.
What it all boils down to is that we tend to get in our own way when it comes to making music and performing. But books have great concepts and ideas to help us.