Remember that it is not important what you say but how you say it. When you criticize, go straight to the point, suggest solutions, listen to the feedback and agree on a timetable for correcting the situation. Remember also to praise for good work.
6. Train your memory for names
Addressing people's names is very simple and efficient. When someone introduces himself to you, so, repeat his name immediately to better remember it. Use names in conversations. Imagining someone's name written on his forehead or connecting a name with a feature of someone's face can help, too.
7. Look people in the eye
While talking with people, maintain eye contact even if you talk to a hall full of people. Eye contact is one of the most important aspects of interpersonal communication.
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Article source Forbes.com - prestigious American business magazine and website