Chapter 2: Active Listening: The Lost Art of Not Talking While Someone Else is Speaking
Listen attentively, without interrupting, and never, ever, nodding off.
When in conversation, maintain a minimum of 3 feet of personal space. Any less, and you're too close. Any more, and you're just being antisocial.
For further reading, visit our subpage on Verbal Fluency: The Art of Speaking Without Sounding Like a Robot