Next time you're having a conversation, remember: it's not all about you. Everyone has the right to communicate
Practice listening. If your mind wanders during a conversation, try focusing on a person's body language, or the tone and pitch of their voice.
Literally, you need to keep to your mouth closed. If your mouth is not open. You can't interrupt people right. So, make a conscious effort to, physically, keep your mouth shut. So, while others are talking keep asking yourself: Is my mouth closed?