Common courtesy tip number one when walking across a driveway or street in a parking lot please do not walk diagonally walk straight across. It annoys me and everybody else to have to wait for you to lounge around and walk on a diagonal.
Common courtesy tip number two when backing out of a parking spot space put the fucking phone down.
And number three. When trying to enter an elevator allow the people on the elevator to get off first and give them space to do so. Don’t go barging into the elevator until everyone that wants to get out is out.