I love to read, and I like to gain perspective through a lot of different mediums but reading, especially in the music psychology category is great.
An amazing book for really anyone that I am going to reread- The Art of Possibility by Ben Zander. It is really great, and I can't recommend it enough.
I need to read this book again in order to remind myself that I can tackle my goals (like being part of a professional orchestra)... the book is based on the concept that when you open yourself to all possibilities- especially positive, there is no limit to what you can accomplish. What an amazing concept!