I work am currently taking 15 credits at the University Maryland. I have classes from ~8am until ~noon everyday. I also work for the University of Maryland Police Department. I'm usually there 40-50/hrs a week. My normal hours are 2200-0600 M-F, plus I have to come in sometimes during the day to give recruitment presentations, interviews etc. Being a supervisor isn't what its cracked up to be. I must say though that I am amazed at what some people will say in a job interview.
As you can see, I don't really sleep. I am thinking of having an IV of caffeine put in.