The instant New York Times bestseller! We all face thousands of decisions every day. They define the trajectory of our lives. There’s just one problem: most of us have no idea how to make them. Here, Shane Parrish – ‘the former spy who helps Wall Street mavens think smarter’ (New York Times) – draws upon conversations with the world’s leading entrepreneurs and experts to offer a simple, revolutionary method to clear your head and make better decisions. Drawing on examples ranging from the evolutionary origins of our ’emotion default’ to the secret history of the Challenger disaster, Parrish offers powerful mental models to make sense of any situation. And he reveals a simple, actionable method for smarter decision-making, starting today. Along the way, he shows that the secret to mental clarity lies not in how we approach the most high-stakes moments – but in our tiniest, most everyday decisions. It’s a simple idea with startling implications: if you clear your head today, you change your life tomorrow. It will help you unlock the life you seek. ‘An indispensable guide,’ James Clear, author of Atomic Habits. ‘A game-changer,’ Morgan Housel, author of The Psychology of Money. ‘A must-read,’ Mark Manson, author of The Subtle Art of Not Giving a F*ck.