Auburngirl, I know what you mean... my sleep patterns get really messed up sometimes and it can take all I have to focus on my reading for more than 15 minutes. It makes studying for exams really hard!

What helps for me is like what pandora said: going to bed at the same time, writing, etc. Sometimes when I feel like taking a nap I'll find something to do instead like taking a walk or trying out a new recipe. Sometimes things like that will wake me back up.