What toll does it take, over time, if you get too little sleep; skip breakfast or settle for something unhealthy; struggle with a relentlessly challenging commute; attend meeting after meeting with no breaks in between; pump yourself up through the day with multiple cups of coffee or sugary snacks; deal with hundreds of emails that accumulate in your inbox; remain at your desk for lunch if you eat lunch at all; push through fatigue in the afternoon; head home at night feeling exhausted, but continue to check email through the evening; work on the weekends; and limit your vacations to no more than a week or two, if you vacation at all?