When you mirror other people, you truly experience their feelings. Mirroring is a natural process during which you create rapport. This set of actions simply allows you to do it more consciously.
Mirror their breathing, gestures, posture, tone, tempo, and the volume of their voice, favorite words, or phrases.
Be careful not to emphasize their weak points like ticks or stuttering. They may think that you are mocking them.
Notice the difference in their behavior towards you.
Do they feel closer and more bonded to you?