How often do you all change your pillowcases, which come into direct contact with your skin? When I was having severe skin troubles, I started changing my pillowcase every other day. To my surprise, the tiny bumps that used to appear around my chin and cheeks completely disappeared. It turned out that sweat and dead skin cells accumulated on the pillow while I slept, and then irritated my face when they came into contact with it.
Adding 'going to bed before midnight' to this makes it even better. Unlike in the past when I used to stay awake at 12:34 AM, I am trying to go to bed as early as possible these days, and it definitely seems scientifically correct that there is a time for skin regeneration. The day after a good night's sleep, my complexion looks brighter and my skin texture is noticeably tighter. Just following these two things—washing your pillowcase and getting a good night's sleep—can dramatically improve your basic skin condition.