74-time 'Jeopardy' champ Ken Jennings stopped by to promote his new book, 'Because I Said So!' Told that Ben Stern was his biggest fan, Ken laughed: "That's what everybody tells me. 'My grandma loves you, man!' When you hit a certain age in this country, you have to plan your life around 'Jeopardy.'" Asked for the secret to his $3.1 million success, Ken admitted a lot of it was technique: "The buzzer's huge. On the TV, you see people flailing around like idiots, but it's [really] tough." If you punch in before producers release the buzzer, "You're not getting in. You'll get locked out for a fraction of a second. So buzzing too early is like as bad as coming in too late."