The third part of Clear Thinking is about protecting yourself — specifically, protecting your decision-making from your own worst patterns. Parrish calls these safeguards: pre-committed rules and systems that activate before your defaults can. Examples: never send a message when you are angry — a rule that removes emotion from communication. Never agree to something important on the spot — a rule that removes the social default from commitment. Never invest in something you cannot explain in two sentences — a rule that removes complexity from judgment. Safeguards work because they act before the default does. You do not have to defeat the default in the moment of temptation. You defeat it in advance, when you are calm, by building the rule into your system.