The three most important qualities i think a person needs to be able to get along with other memners in extended family are friendliness, kindness and understanding. Frist one is friendliness because you make other people happily and closely and they will open their soul with you. Second one is kindness because you should be polite with someone and they will be polite with you. We need to have respect.
Finally is understanding because when someone is sad and embarassed, they are really need you to share their story, they need you to listen, encourage, contribute for their story. We need to love everything around us, especially is Family. Let put down your cell phone and spend your time for your family.