Jumping in before someone completes what he/she is saying is one of the common traits we people have. We sometimes interrupt people when we get uncomfortable with what they are saying, reply immediately they end what they are saying, and even get worse than this just to ensure our point of view is supported. This habit can be a huge hindrance in learning and acquiring useful information that is capable of helping or building us.
The two ears and a single mouth on our heads shows that we are built to do more of the listening than talking. Though it feels like a race to pass on what is on your mind before the chance gets away, we need to understand that it doesn't make it any different when we say it later or the next day. Probably it will give you a chance to reflect on it and express it better.
To be a good listener opens you to a variety of opportunities in life. It grants you more knowledge than what your letting out whether it's during an argument or trying to convince someone. This information can help you to give a clever response at the right time something that will win you audience easily the next time you speak.
Let's not forget how someone feels treasured when he/she is being listened to. This skill will win you people's hearts and favors which might be a big step in your next stop at success.