Tbh the oura ring has been a game changer for a data nerd like me. I can easily see how some exercise in the day actually impacts my HRV[1] and then the quality of my sleep. Had a heavy night of drinking? Watch what the oura ring reports not just on the same night but even the next night :) Basically if you're thinking of starting your own "protocol" for sleep and would like to A/B test what works and what seems like superfluous ceremony, the oura ring is a cost-effective way to measure the effectiveness of said protocol.

I think the protocol described in the article isn't anything terribly new. Most folks on HN know that blue light actually messes with sleep so if you're planning on using a screen until right before you goto bed it's a great idea to use the blue-light canceling computer glasses. Mindfulness meditation is generally a great practice to calm oneself and be reflective. I don't personally sleep at 8:45pm (rather, 11:45pm) but I do have my meal a few hours before I goto bed. I also don't drink much water closer to bedtime so I'm not rudely awakened in the middle of the night to urinate. I live in a place where the black-out blinds aren't a necessity. I've never messed with deep sound waves.

Of course, some folks will exclaim "Well I don't need a device to give me a report card on how well it thinks I slept!" ¯\_(ツ)_/¯

[1] https://ouraring.com/heart-rate-variability-basics/