On my first day of working at home, I had a couple of cups of coffee later in the afternoon — not so much as a pick-me-up; more because we have the heat off during the day and I wanted a shot of something warm. That night, I slept for crap. Yesterday — my second day — I avoided the coffee after about 11am or so. Last night, I slept like a baby.
Now, clearly, more research may be needed — but I think in the meantime, what’s also needed is some decaf. Bah.