Thanks for the tips and ideas! I agree on a lot of the stuff that I’ve tried already. Maybe three (and a half) things to add:

• Theanine helps me fall asleep when I had to work up until bed time. Take ~200mg, brush teeth, do some bed time routine and I can generally let go of the stress very well after like 20-30 minutes.
• Slow box breathing helps a lot with calming down as well.
• Maybe obvious, but: Doing a cold bath right before bed time is not the way to go. I need about 2 hours of activity after or falling asleep is very tough.
• You kind of already mentioned it, but there’s nothing better when I am sick than sleeping throughout the day without an alarm. Getting like 15+ hours of sleep has helped me through a lot of light diseases lately.