I agree with how important this is, but for me, the most significant improvement in my sleep has been pushing my dinner very early, ~6 hrs before bed, and having it be my smallest meal of the day. I usually feel quite hungry about an hour before bed but if I get over that hump my resting heart rate is much lower at night and my appetite the next day is much lower. It was validating to see Bryan Johnson sharing the same findings on x.

I think one of the underrated things that Bryan does is he regularly emphasises how central sleep needs to be in your health. I haven't heard that consistant message drilled in by anyone else and it helped me realise how a lot of the things i found difficult to recruit energy/discipline/motivation were related to the low priority I placed on sleep.