http://idrs.colorado.edu/Publications/DR/DR10.3/DR10.3.Will.html
from Glyn Williams
The maxim of "success at any cost" can be witnessed in many musicians. With their focus on the end result, they labour through hours of practice, pain and anguish. This endgaining approach could catch up with them physically as well as mentally later on in life and might even destroy their dream of success. The Alexander Technique offers a possible alternative route to success
http://www.johncipolla.com/Practice.html
Meditate for a few moments before practicing. Closes your eyes, take a few slow deep breaths and try to relax your muscles. Don't worry if you have a lot on your mind. Just relax your muscles and take deep breaths. This will help your concentration and productivity