Listen with your ears, eyes, body, and mind

Maintain eye contact while making conversation
If you feel uncomfortable looking somebody directly in their eyes during the entire conversation, you could look at the spot between their eyes.

Use verbal cues
Ask additional questions about the topic of the conversation, be attentive, and remember what the other person is telling you. Some of the questions and phrases you might use are: How did you achieve your success? What are the advantages/disadvantages of…? That sounds interesting! Could you tell me more? You must meet extraordinary people! Hmm, I see…, etc.

Keep your body language positive
Lean forward and face the person you are talking with, open your arms, relax your body posture, nod, and smile.