[GeneralMaximus]

I had sleep issues for years until I discovered that I'm allergic to dust and pollen. Washing my sheets every few days, vacuuming them with a small hand-held vacuum cleaner before sleeping, and using an air filter in my room dramatically improved my sleep.

Other things that have interfered with my sleep in some form or another are vitamin deficiencies, exercising way too much at once, caffeine late in the evening, alcohol, and anxiety.

Despite all the research, I haven't found screen time to have any impact at all on my sleep. I sometimes play the Switch in bed right before I crash, and it doesn't seem to affect anything.

Edit: oh, another thing. A bit of music or a podcast really helps me fall asleep faster. They help me turn off all the work-related thoughts in my head and focus on something entirely different.

[esperent]

Similar issue here except for damp. I live in a very humid country and the increase in my sleep quality once I started to run a dehumidifier in my room at night is crazy.

I used to wake up sneezing at 4am regularly and now I never do.

[sizzle]

I had the opposite issue with low humidity, dry nasal passages and bloody noses, sore throat, can’t sleep etc. until >~25% humidity is restored