If you do not yet know NLP, this is a good introduction for those who have trouble making in-person connections.
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The author focuses on the fact that impressions are formed in the first 10 seconds or so when we meet someone. He encourages us to open ourselves up physically (hands open, coat unbuttoned if you have one on, relaxed), look the other person in the eye, beam (like you are shaking hands), say Hi! with a positive attitude, and lean towards the person. These are universally interpreted as being genuine indications of interest that are perceived by the other person's subconscious mind, and the other person will almost always respond in kind.
There are three primary modes that people use to process thoughts (visual, auditory, and kinesthetic -- both emotions and physical feelings), and remembered and imagined versions of each one. The book contains clues (such as eye movement and choices of verbs) to understand the person's preferences. You are encouraged then to be sure to include those modes. This advice was the weakest point of the book. Dr. Bandler has shown since developing NLP that equally emphasizing all of the modes works even better, so the author would appear not to have worked with Dr. Bandler in some time.
Finally, you are encouraged to mirror and match the behavior of the other person (from breathing to posture to gestures).
The key points of the book, then, can be summarized as a positive attitude toward the other person, synchronicity in actions and locating commonalities, using the correct conversational modes, and emphasizing the sensory preferences of the other person.
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After you have absorbed these lessons, consider how much your attitude determines the reactions you get from other people. If you are afraid to meet them, that will show. If you are delighted to be with them, that will also show. If your message is important to you, you should take a little time to dress up your attitude and responsiveness if you want to really be dressed for success. Ask yourself if you would really want to listen to you when you do not take the time to be an interested communicator. If not, now may be a good time for a change. You, too, can be irresistible -- when you want to be. Also, be aware that the person who seems so interested in your may simply be a devoted student of NLP. Keep probing for trustworthiness!