Most people try to solve sleep at 10 PM. The bigger lever is often 7 AM.
A 2003 study in the journal Sleep by Van Dongen and colleagues found that six hours of sleep per night created cognitive impairment equivalent to two nights of total sleep deprivation. The weird part: the subjects felt like they were adapting. Their performance said otherwise.
Three ideas from the research stand out: Morning sunlight within 30 to 60 minutes of waking helps anchor circadian timing and makes it easier for melatonin to rise at night. A consistent wake time usually matters more than another bedtime trick. Sleeping late on weekends can act like mini jet lag. A cooler bedroom, usually around 65 to 68 F, helps the body drop temperature enough to fall asleep and stay asleep.
One more that gets missed: caffeine hangs around longer than people think. With a 5 to 6 hour half-life, a 3 PM coffee can still interfere with deep sleep later that night.
Not medical advice, but if sleep feels off, I'd test one variable before buying another supplement: early outdoor light, the same wake time every day, or a colder room.
What changed your sleep the fastest once you got consistent with it?