"Many times it is more important to know what not to do than what to do." - Charlie Munger
Principle: Focus on what is most important. Remove everything else.
 
Insight: Charlie Munger says that the most common trap we fall prey to when making change is not knowing when to readjust, or "loss aversion".
Insight: In The Art of War, Sun Tzu talks about the importance of self-evaluating, through the eyes of your opposition.
Principle: Ask: "What is the one thing I most hope my competition doesn't do?".
Principle: Ask: "If I were the competition, what is the number one thing I would do to attack our organisation?".