[isostatic]

Once I'm asleep I can sleep through a lot (and even if I do wake up, get out of bed, and put the kids in the shower after they've been sick - I have no memory of it in the morning)

However getting to sleep is tricky. I've found two things that seem to work.

One is listening to Legally Blonde the musical on repeat with headphones on -- on a plane even where I don't get a bed this allows me to sleep for a good 6 or so hours on an overnight flight. It's weird, I think I had it on once some years ago and fell asleep, now my brain feels to be "conditioned". If I listen to it I start feeling sleepy.

The other is at home where it's quiet, dark, and no movement. I start thinking about orbital mechanics (at least as much as KSP has taught me), and I usually fall asleep fairly quickly.