It happens almost every day. I wake up when I need to or even before I want to and I’m tired. On the way to work I’m yawning. At lunch I want to sleep. I begin to nod off on the way home. About the only time I don’t feel tired is when I’m excited about doing something and I’m distracted by the activity, or the coming inevitability of it, or I am overly tired and I just don’t feel like sleeping any more. I eat well, I get 7 or 8 hours sleep a night, I exercise regularly and I just can’t fi...