Not sure if this is on topic, but if you absolutely HAVE to sleep:
Immovane (US) or Zopliclone (CDN).
They're prescription, but half a pill knocks me out for 8 hours, if I absolutely have to get some sleep.
I almost never have trouble sleeping, but it helps to know I have it if I need it. No side effects that I've noticed when used infrequently. YMMV.
I asked my family doctor once about it (General Practice), and he claims you're better off by getting some sleep with pills then not at all.
Why would you want to sleep any other way than how you're naturally inclined?