Everybody needs a refresher course, so here you go. This isn't specifically an elevator safety guide, but merely a list of things people fail to do in elevators that annoys me based on past experience (and keeping these ideas in mind does ensure you ride safely).
Listed in no particular order.
1. Give priority to those who need the elevator, such as people in wheelchairs, older folks, strollers, technicians, people with heavy loads / items on wheels…etc.
2. Let people off the elevator before boarding.
3. Make sure the elevator is traveling in the right direction before you board. If it appears someone is trying to board when it is going the wrong direction, let him or her know (e.g. “This is going up”).
4. DO NOT attempt to shut the door on someone trying to catch the elevator! There is nothing wrong with letting the doors close naturally, but holding the door for someone goes a long way.
5. The first person to enter the elevator either selects their floor and gets out of the way of the button panel, or offers to press floors for the rest of the boarding passengers.
6. The people getting off first should stand closest to the doors. In order to avoid unnecessary shuffling in the elevator, those getting off later may step out and hold the door for those who are getting out, and then re-enter.
7. Exit promptly when you arrive at your floor.
8. Unless you're in a wheelchair and there's no accessible bathroom on the floor you're on, DO use the bathroom before you use the elevator.
9. DO NOT pass gas, ride a short distance, make out (yes, I have witnessed this), or stand too close to anyone in the elevator.
10. IF YOU GET STUCK, do not panic. One rope alone can hold many times the weight of a fully loaded car, and most elevators are equipped with five or six. Ring the alarm to draw attention, press door open if the car didn’t move at all, and use the emergency phone to call for help. In addition, elevator shafts are airshafts, so there is no need to worry about running out of air. NEVER under any circumstance try to get out on your own! Attempting to get out without professional assistance could result in injury or death.