Even at MIT I never met anyone who could work productively beyond 55-60 hours a week for extended periods. Beyond 60 hours a week, one is merely displacing tru

Even at MIT I never met anyone who could work productively beyond 55-60 hours a week for extended periods. Beyond 60 hours a week, one is merely displacing true friends with coworkers for many social activities, such as going out for dinner, coffee or discussing the news. There is a balance that is lost - no TV; random, lazy Saturday afternoons are a luxury; spontaneous get togethers with friends are no longer so practical. But friends and other activities don't have to be sacrificed, merely structured into one's routine.