Why I Can't Sleep

I struggle to sleep on various nights. Then I wake up cursing myself for not getting enough sleep. Such is the vicious cycle of my periodical insomnia.
  1. Thinking about TV shows.
  2. Thinking about tomorrow.
  3. Thinking about having to wake up.
  4. Thinking about thinking.
  5. Sheep count at 236.
  6. It's too hot.
  7. It's too cold.
  8. What's that noise?
  9. Is it Friday yet?