“They each pushed themselves to do something at ages 29, 39, 49, and 59 that they didn’t do, didn’t even consider, at ages 28, 38, 48, and 58—and didn’t do again when they turned 30, 40, 50, or 60.” Daniel Pink with an interesting look at what numbers have to do with our decisions: You’re Most Likely to Do Something Extreme Right Before You Turn 30
… or 40, or 50, or 60 …