Next time you’re in an all-day meeting focus on observing the other people in the room. Make an effort to stay engaged, but primarily focus on watching people with the goal of determining who was the most effective leader at the end of the meeting.
I’ve found that many times it was not the obvious choice. The most effective leader was not always the person who had the biggest title or who was the most extroverted or who was the loudest. Many times it was the person who patiently listened and then calmly recapped what was said earlier, offered a perspective, and then went back to listening.
If you watch the entire meeting play out like a theatrical peformance, in the end you will see who had the most effective influence on the decisions that were made. In doing so, you may learn some approaches that can make you more effective as a leader.