1. Begin with praise and sincere recognition of the merits of the interlocutor.
2. Point out the mistakes of others not directly, but indirectly.
3. First, talk about your own mistakes, and then criticize your interlocutor.
4. Ask the interlocutor questions, instead of something to him to order.
5. Give people the opportunity to save their prestige.
6. Express people’s approval for the slightest of their luck and note their every success. Be sincere in your assessment and generous in praise.
7. Create people a good reputation, which they will try to justify.
8. Have recourse. Make the impression that the error you want to see corrected is easily correctable; Do so that what you are encouraging people, it seemed to them easy.
9. Strive for people to be happy to do what you offer.