Sun Tzu in his most quoted aphorism said, “ He who has a through knowledge of himself and the enemy is bound to win all battles.” Notice the emphasis on the knowledge of self first.
Many PM”s ignore this key fact. Too many times I see people who are trying to manage groups and they can’t manage themselves: They are late for meetings, they are rarely prepared for meetings, their status reports are always late. In this day of matrix management the only resource that a project manager can truly control is themselves.
A chaotic project manager invariably means a chaotic project. The saying “a fish rots from the head” applies to all projects. If you can’t control yourself, then abandon all hope ye who would be project managers.