Elevator etiquette

Tips I found online for elevator etiquette that people in my building NEED to know:

Waiting for the elevator...

• Don't push the Up button when elevator doors are about to close just so you can make everyone wait while you squeeze in.
• Do hold the elevator doors open if someone's only a few seconds behind you.
  In the elevator ...
• Don't stand uncomfortably close to someone, especially if there is plenty of space. Forcing yourself onto a packed elevator, thereby smooshing yourself up against someone, is just as bad.
• Do cover your mouth when you cough or sneeze. (Not just in elevators, but anywhere, really.) You might think this one is obvious, but no ... it's not.