How To Change People Without Giving Offense Or Arousing Resentment.
Some suggestions to accomplish.
Begin with praise and honest appreciation.
Call attention to people's mistakes indirectly.
Think about your own mistakes before criticizing the other person.
Ask questions instead of giving direct orders.
Let the other person save face.
Praise the slightest improvement. Be "heart in your approbation and lavish in your praise."
Give the other person a fine reputation to live up to.
Use encouragement. Make the fault seem easy to correct.
Make the other person happy about doing the thing you suggest.