Traits of a good listener include being non-evaluative, paraphrasing, reflecting implications and hidden feelings, inviting further contribution, and responding non-verbally. A good listener does not judge the speaker, paraphrases to clarify understanding, uses body language like nodding to encourage the speaker, and asks open-ended questions to learn more without interrupting the flow. Non-verbal cues like eye contact and facial expressions also help convey interest and understanding to the speaker.