I couldn’t understand why my productivity went down when I had deliberately made more time available to write. Then I realized it was because I wasn’t flying as much. Before, I’d sit on a plane and pull out a computer and start writing a speech or whatever. And on most planes, there are no plugs, so I’d open up my computer and wrote until the battery died. Because I had this pressure of knowing the battery would die, I wrote monumental amounts in short periods of time.