People who are successful are excellent listeners, and they leverage their listening and communication across their groups, personal and profession. Be it in a meeting, attending a talk, or just having coffee with a colleague, they pay attention and read between the lines to know if something that could benefit them is on the charts.
Why is this important? Well, opportunities are often hidden in ordinary discussions. It could be a new position opening up, a new senior resource joining the team, etc, and when you listen, you pick up things others might miss.