When I was shift-working, I often had to be asleep at 6.30pm to be at work at 2am. I learned that sleep comes in waves. If you just put you head down and wait for sleep you can be awake for hours. Relax, read something boring and wait for the sleep wave to hit you. Then go directly to bed. Wait too long and the wave will pass, leaving you hanging until the next one.

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Calm, quiet, smooth, devastating