non verbal passive actions

Maintain eye contact.
Nod your head to convey that you are listening or that you agree.
Smile and show interest.
Lean forward to show the speaker you are interested.
Use a tone of voice that matches your message

the do nots

Avoiding eye contact and looking away from the speaker.
Closing your eyes or tensing your facial muscles.
Excessive yawning.
Using body language that conveys indecisiveness or lack of confidence (e.g., slumped shoulders, head down, flat tones, inaudible voice)
Speaking too fast or too slow.