It doesn't matter what your habit is--lark or owl. When you're awake, be fully awake. To be fully awake, I think, is the only thing that will guarantee sleep. To fully accept your situation at this moment in the world is the biggest act of rebellion you can undertake. It is fierce and wild to show up as yourself. Do it enough, and the powers that be won't know what to make of (or do with) you. That's when you'll know you're free.