The greatest virtue is kindness. You can't love everyone, but you can be kind to everyone. Don't try to impress others. Let them have the fun of impressing you. Nothing of consequence was ever achieved without enthusiasm.
Positive people attract others, while negative people repel.
You have greater impact on others by the way you listen than by the way you talk. Gossip cheapens the one who gossips more than the one gossiped about. Call a person by his or her name and use it often in conversation. Differences are bound to occur and can be resolved if conflict is managed in a polite manner. If you are given to making fun of someone, be sure it is of yourself.