@yosh I'm on a similar quest this year, and I've been gathering tips from Huberman Lab's podcast. It has helped me a bunch, although I can't say whether it has been placebo or not. I thought I'd share regardless.
https://open.spotify.com/episode/2OZwx69tcePJ1nZfKPQRbu?si=QMSjAj8ETWGH6-4e54GYlA
For now the ones I've been implementing in my schedule are the perception of light in the morning and cold showers.