For years now I've been falling asleep to documentaries on YouTube. Mostly about space or military history. The often monotonous tone of narration usually lulls me off quickly.
The draw back is if I find a particularly interesting one and get to focused on it.
What about you phukers
Last night the Tribe / Twins game. When there isn't baseball I fall asleep in silence or to the sound of a fan. My favorite is to fall asleep in a tent to sounds of outdoors.