Did you hear Jens Voight after Stage 9 of the Tour the other day?
A reporter, talking to Jens about his heroic effort on the last climb of the day, asked him (and I'm paraphrasing here) what he does when his legs are screaming at him during a brutal day in the saddle.
Jens said (again, paraphrasing), "I look down and say 'Shut up, Legs' and hope they listen!"

I thought that was GREAT. I'm going to have to incorporate that into my riding!