A site dedicated to elevator etiquette.

A few snippets:

• Pay attention to which buttons have been pressed when you enter the elevator. Once a button has been pressed, nothing more can be done. Re-pressing the floor button will not make the elevator get you to your floor any faster. Re-pressing is disrespectful to the person that has already pressed the button and is generally irritating.
• Never, under any circumstances urinate or defecate in en elevator. It is not, and never will be considered funny by anyone.
• If you are going up or down one floor, use the stairs! This rule should especially be observed during peak traffic times like morning and afternoon rush.