Building rapport involves matching various behaviors of the other person, including their sensory modality, physiology, voice, breathing patterns, how they process information, and common experiences. Specifically, it recommends mirroring the other person's eye contact, body language, tone, speed of speaking, breathing, how much information is presented at once, and finding common interests or backgrounds to discuss. The goal is to unconsciously mimic the other person's behaviors to show that their message is understood and to create a connection.