Ask HN: Sleeping Hacks

I'm writing a chapter on the concept of sleep for my online book (http://howtogetfocused.com). I'm researching what science holds true about sleep, but I'd like to hear any stories or any interesting takes some of you have on improving sleep.

We live in a world where a common response to the question, "How're you doing," is "I'm tired as hell."

Any stories or articles you've found interesting would help. For instance: how to enhance sleep, how to grow the mind through sleep, sleep tricks (I know Tim Ferris had a neat exercise on this a while back).

Thanks