People hoard information for too long. They want a big dramatic curtain flourish and thunderous applause, but that’s not what they get. They get confusion and fear.
Do you want the meeting to run well? Then tell people what it’s about a week in advance. When you ambush them they can’t be prepared and their attention and responses are scattered. You don’t need to outflank people. They aren’t your battlefield opponents.
This is a reminder mostly to myself.