Here's a very eloquent TED talk on the difference between winning and success from legendary basketball coach John Wooden.
Given that effort is required for success, but equivalent effort does not necessarily produce equivalent success. I think it gives some interesting perspective on the difference between objective achievement of a particular goal, and personal improvement that can potentially lead to objective achievement.
This video is a bit old, but it's worth seeing if you haven't already.
http://www.ted.com/talks/john_wooden_on_the_difference_between_winning_and_success
