If you would have friends, be friendly. If you would even have fun, make fun for someone else. Read the comic papers; not as to become sarcastic, no--but remember, ever, even thy Master, Jesus, could laugh in the face of the Cross. Can ye find a better example?
But the less one thinks of self's opinions, and the better listener one becomes, greater may be the opportunities for being of help or benefit to those about the entity.