Relatedly, I've found my life-long "sleep problems" go away
very fast if I stop using electronics
or electric lights after sundown.
Go figure, you light up rooms with hundreds of candle-power like it's friggin' daytime, and have world-class entertainment of most any kind available at the press of a button like you're living in a World's Fair crossed with Vegas crossed with a Red Light district crossed with a video game arcade, and it's hard to sleep and you don't feel tired as early as you do if you don't do those things. Live like it's pre-war (more or less) and the problems vanish. Who'd have guessed?
Hard to keep that up in a modern world with two working adults who need to Get Shit Done at night and zero other people you know are living on that kind of schedule—plus, Winter nights are way too long—but it worked. Sun goes down, read or play cards or whatever by candle light (I found two beeswax candles next to each other were enough to read by—and you'll quickly figure out why really-old fireplace mantles often had mirrors behind them, if you didn't already know!) for an hour or so, and the yawns are coming hard and fast, time to go to bed.
Shit for air quality, so, that's a problem. Never did find a cheap battery-powered warm-light not-brighter-than-three-or-four-actual-candles lantern to replace the candles with, while I was trying it.
Once you're used to it, whole-room lighting seems blindingly bright and totally insane. Interesting for getting another perspective on ordinary modern life.