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Be a Leader: How to Change People Without Giving Offense or Arousing Resentment

Talk 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 and praise every improvement. Be "hearty 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.

Good ones....It is difficult to do all that, but we can try...

Really good book. If you don't have time for the paperback, get the Audio Edition which is the route I went.

Qui compte dix amis n'en a pas un.

Yes, audio edition can help rest our eyes.
Pocket book edition can help give some rest to our ears.

Qui compte dix amis n'en a pas un.
Very True.
Translation=
Who counts ten friends does not have one of them.

Yes, we can try...one step at a time.

Thanks for all your comments