Here is a great article from Success Magazine interviewing Michael Phelps.

http://go.success.com/newsletter_archive/2012/3/V5_I2.html?utm_source=Listrak&utm_medium=Email&utm_term=http%3a%2f%2fgo.success.com%2fnewsletter_archive%2f2012%2f3%2fV5_I2.html&utm_campaign=Seeds-2012-03-13&utm_content=Michael+Phelps+on+Sacrifice%2c+Learning+from+Mistakes