Lound or annoying sounds can make sleep nearly impossible. Conversely, some types of sound can actually make sleep easier for some people.
Over the counter drugs for sleep vary widely in efficacy, and it largely depends on your personal reaction.
If you get too much light exposure, you won’t sleep well – it’s that simple. Light is the main driver of circadian rhythms and melatonin production.
Supplements are potentially even more interesting for sleep than they are for pain. That’s because there are only a small number of pharmaceuticals for sleep, and many don’t do well on these.
Most people have only slept on a few different beds for their entire lives. That leaves a lot of room for experimentation and potential sleep improvement.