Summarize this article:

Don't leave public spaces less clean than when you arrived. Don't litter, eat meals and snacks without making a mess, clean up after yourself and never, ever do anything dirty in a public bathroom. . Being clean is nothing without being organized. A clean house means for clean thinking, not feeling cluttered mentally as well as physically. Never ever just throw your clothes anywhere, because it makes you look dirty and unclean when you wear them. The cleanest person can appear dirty if they pick their nose, make lewd comments, break wind a lot, burp, or do anything else commonly perceived as dirty.

Summary:
Avoid being dirty! Be organized Fold your clothes or hang them up on a hanger. Have good manners and avoid dirty habits.