Heather Boland has provided follow-up information on mental preparation for athletes.
Zone of Excellence
www.zoneofexcellence.ca
There are some books that you can purchase, as well as some free articles to read online. The following are some links that you may find helpful to get a background in the work of mental performance consultants.
http://www.lifepositive.com/Mind/psychology/positive-thinking/positive-thinking.asp
http://www.mindtools.com/page11.html
Also, below are a few websites that have free audio files with different breathing and relaxation exercises.
http://www.allaboutdepression.com/relax/
http://students.sfu.ca/health/healthpromotion/yourhealth-videoandaudio.html
http://www.hws.edu/studentlife/counseling_relax.aspx