From A Weak to Confident Communicator - 30 Day Challenge
Everyone loves to speak and make a point. In this quest to make your voice heard, you might interrupt someone who is speaking.
Effective communicators never interrupt or cut someone. Doing so is a sign of disrespect and makes you come across as arrogant. No one likes a person who cuts people to make his point.
Today, you will not interrupt anyone until they are finished. Even if the other person speaks forever, you will wait for a pause to talk. Again, this does not mean you jump to speak when a pause occurs. Wait for the other person to make his point and speak when it is appropriate.