What does is take to be a clutch kicker?

Fascinatory story about what it takes to be a clutch kicker, and some hints that maybe Vinatieri isn't any more "clutch" than others, he's just luckier that his misses didn't come in the really moments. Particular apt, perhaps, in light of last week's 29-yard, last-minute miss?

http://www.nytimes.com/2007/10/28/sports/playmagazine/28lewis.html?pagewanted=1&ref=playmagazine