Sorry, this probably won't be of much help, but I have insomnia. Instead of tossing and turning and wasting that time at night, I give myself five minutes to fall asleep. If I don't, I turn the light on and read. (My dog, who doesn't approve of my disgusting reading habit, sighs, gets up, and goes to sleep under the sofa.) My husband sleeps soundly, so he's no problem.
I've finished LOTS of books that way.