A girl at my school who was anorexic cut out pictures of really heavy naked women- like 400-500 pounds, and posted them in her locker where it was hard for others to see them, they fell out one day and guidance found out and she never came back to school.

Not a good habit, though!

I have a tendency to forget things with my schizophrenia, so I carry around a tiny marble composition book to write things down immediately, and date them. It has worked wonders with my productivity.