Listen to someone express an opinion that's the opposite of your today. It could be on any of a variety of topics, such as politics, the environment, religion, drugs, war, the death penalty, or what have you. Refuse to impose your position, and instead remark, "I've never considered that point of view. Thank you for sharing your ideas with me." By allowing a contrary position to be heard, you'll dismiss ego's attitude and welcome the flexibility of the Tao.

Walter Dyer in Change Your Thoughts - Change Your Life