If you want enemies, excel your friends; but if you want friends, let your friends excel you.
Dale CarnegieThere is one all-important law of human conduct. If we obey that law, we shall almost never get into trouble. In fact, that law, if obeyed, will bring us countless friends and constant happiness. But the very instant we break the law, we shall get into endless trouble. The law is this: Always make the other person feel important.
Dale CarnegieYou can't win an argument. You can't because if you lose it, you lose it; and if you win it, you lose it.
Dale CarnegieBegin with praise and honest appreciation. Call attention to people's mistakes indirectly. Talk about your own mistakes before criticizing the other person. Ask questions instead of giving direct orders. Make the fault easy to correct. Make the other person happy about doing what you suggest.
Dale Carnegie