I'm not always thinking and working ... I think a leader has to really be a balanced, whole and healthy person personally in order to be the best leader on the job.
I usually get up between 5:30 and 6. The good news in Bentonville, Arkansas, is I can be in the office seven minutes later. I like to get in, work on e-mails and catch up.
I was always intrigued when I was growing up, and then in engineering school, with the idea of a perpetual machine. I think of the Wal-Mart culture as that.