End with Sincere praise
A principle for "kind" living is to leave people feeling better about themselves as a result of having met you.
Ask yourself: "What can I say to this person to give him a positive feeling?"
Be sincere in what you say. The goal is not to flatter or to give people a false sense of having attributes they are missing. Rather the goal is to keep on developing your own "good eye" to see the positive in each person.
When you develop positive feelings about others, what you say makes them feel good, as does how you say it -- i.e. with a kind look on your face and a smile.
Love Yehuda Lave