Be alert! When you see an elder or a person with something in their hand, open the door and allow them to go first. Also, keep an eye out for those people coming behind you, hold the door until the person behind can grab it so it doesn’t hit them in the face. At the elevator, let those on the elevator to exit before you enter and hold the doors for others before you board. Same with buildings or rooms - if someone is exiting the building or room through the same door you are entering, let them exit first. Whoever arrives at a door first holds it for the next person. It doesn't matter the gender of either. When someone holds a door for you, remember to say "thank you."