Sometimes a person just needs one to listen. Listen to their hurt feelings through all their venting, listen to their child-like want for a friend, and listen to all the efforts they make to survive in this life.
Listen to a person without anticipating what you're going to say next to contribute to their thought. Listen without pondering on solutions to part of their problem because you missed the other part when you were pondering.
Listen to the heart of a person; who knows you might just hear yourself.