In all honesty, I have not been getting much sleep. But I also don't try to force myself past whatever minimums I can get. If I only have six hours available to sleep after work and rehearsals, I don't try to stay up and study my script more. My body just can't do that, and I listen to it. But I also can't not go to work or rehearsals for extended periods either, so I am just working with what I have.