Remember that no one is better than you are regardless of how much money they have or what their lifestyle may be.
But also remember, that you are no better than anyone else. Treat all people with respect regardless of how much money you have and what your station in life may be. (The housekeeper in a hotel works just as hard as the hotel manager, and the housekeeper's salary is just as important to his/her family as is the manager’s is to hers/his.) Treat both of them with respect.