Shut down before bedtime

It's late. My body is dead tired. My eyelids feel like they're weighing hundredweight. My thoughts waft through dense fog and blur into each other. Everything in me longs for sleep. But something keeps me awake. I'm dead tired and still slew sleepless from one side to the other. The next morning I wake up from a restless sleep and feel as if the whole Riverdance Ensemble had celebrated a wild party at night in my head.
I used to have such nights more often, even though I usually sleep deeply and fall asleep easily. Since I meditate every day, they are very rare. That's pretty great. Relaxing nights make the days so much better!