Complete darkness plays a major role in order to sleep well. Even the tiniest bit of light (past the curtain, under the door, a light on electrical equipment, etc.) can disrupt the production of the sleep hormone melatonin. That is why it is important that it is completely dark in your bedroom.
Make sure your bedroom is dark (possibly with blackout curtains) and that it is not too hot. Sleep, if you can’t obtain absolute darkness, with a
Use junk light dots (stickers) to cover those annoying little rays of light from your monitor or mobile phone (set them to airplane mode, of course). If you are still reading, don’t forget your Blue Light Filtering Glasses niet.