Maybe I missed it, but I didn't see any mention of nail picking (if you're including all skin, not just your face). I have a friend who just mutilates her nail beds be picking at them non-stop... that should be in the top 10 don't list for sure!
I have a very bad habit of popping pimples and always squeeze them which leaves marks on my face. My mother used to shout on me but I never used to stand out those pimples on my face. Thanks for sharing this information and I will never do this.