My 2 rules for being up and alert at 6am: 1. Get in bed by 10pm every night, no exceptions. 2. If I can't sleep after I'm in bed, it means I haven't exercised

My 2 rules for being up and alert at 6am: 1. Get in bed by 10pm every night, no exceptions. 2. If I can't sleep after I'm in bed, it means I haven't exercised enough. So, exercise, then GOTO 1. Downside to this is that it works--after a few days of the cycle, if I try to stay up past 10, I nosedive to half-dead around 10:30.