The worst is having a stack of meetings, back to back. While this can seem efficient, it can also be an enemy of critical thinking. I will get to the end of my day and realize I’ve generated no new thoughts, no new ideas. I’ve only been reacting to circumstances and solving problems. If you find yourself constantly in that mode, you need to reclaim control of your life. You need to stop stacking meetings and start scheduling time to think critically. You’ll never develop as a leader if you cannot master this.