How to be polite

Japanese signs are fun. Especially the "manners" campaigns. Check these out:

http://www.conbinibento.com/2004/07/16/lets-minding-our-manners/
http://www.tokyometro.jp/anshin/kaiteki/poster/index.html

Don't be scared, the Tokyo Metro site is in Japanese, but posters are easy to understand.