I'm shocked that they don't mention sitting in front of the computer or TV before bedtime. Computer monitors and TVs have a bluish light. Blue light down-regulates melatonin, which is the hormone that makes you sleepy.

I used to have a serious acne problem. Cutting down on meat and dairy really helped, but I was still getting a few small pimples now and then after that. It was only when I stopped using my computer or TV late in the evening that I got 100% clear skin.