Listen to the conversation of a stranger, select words and phrases that he uses most often. Closed group of people - families, corporate associations, are used in the same conversation phrases spoken by another person, unconsciously perceived as a password. This is a signal that the interlocutor - "his", he can be trusted. Talk to imitate your friend, eat the same phrases, and your partner will feel confidence in you and will be revealed in its communication to a greater extent.
Such verbal imitation that you make quite consciously and deliberately, your partner will not notice - because it is the natural use of such terminology. But it is, nevertheless, unconsciously arrange it to you. This is especially true when you are discussing their professional activities. In this case, avoid the use of incorrect or inappropriate words, so as not to lose contact. This principle speech "echo" implies that you will call objects and phenomena in the same words, what defines them your partner.
To get a better feel of another person, try to move it. Use in conversation his gestures. Watch as he walks, sit down, holding a cup of coffee. Try to repeat his movements and to do so in the same rhythm. Such simple techniques familiar to psychologists who use them in their work with their patients to relax their cause to be frank. There is no reason to not use this technique in everyday life, to get a better feel of another person.