Rule 1: Begin with praise and honest appreciation.

Rule 2: Call attention to people's mistakes indirectly.

Rule 3: Talk about your own mistakes before criticizing the other person.

Rule 4: Ask questions instead of giving direct orders.

Rule 5: Let the other person save face.

Rule 6: Praise the even the slightest improvement.

Rule 7: Give the other person a fine reputation to live up to.

Rule 8: Use encouragement. Make the fault seem easy to correct.

Rule 9: Make the other person happy about doing the thing you suggest.