"There was a show in which these scientists shared the secrets of the world's oldest living people, people still functioning past 100 years-old. They found that they exercised everyday, they ate in proportion, that they had a social network of family and friends, and that they had some sort of faith. So, that's what I'm doing now, very consciously. Instead of working out three times a week, I do something physical, like a one-hour walk everyday."