It's not just the hours working but it is also the hours worrying about work as well. All this adds up. It increases our stress levels and robs us of precious time we could have spent doing something much more enjoyable. Most work related stuff is not as important as we think it is. What were you doing this time last year? I bet most people can't remember. At the time it probably felt super important.  We all need to take time to enjoy life.