I'd not mind doing some self-experimentation with sleep, but I have a hard time drawing a line with when to stop and try to evaluate what the effect was. Change

I'd not mind doing some self-experimentation with sleep, but I have a hard time drawing a line with when to stop and try to evaluate what the effect was. Changes might be so gradual as to not really being able to tell ("do I feel better now than before?"). I wish there were more objective measures for this sort of thing that didn't require a sizeable study population to be reliable. I guess we need more biomarkers for... sleep health?