In a world overflowing with conflicting advice, it's easy to feel lost on your personal growth journey. One expert tells you to embrace a rigorous 5 a.m. routine, while another champions the art of rest. A stream of one-size-fits-all solutions promises success but often fails to account for the single most important variable: you. In Everyday A/B, author fAIzi provides a revolutionary solution. This book challenges the myth of universal advice and empowers you to become a scientist of your own life. Drawing from the proven principles of A/B testing, you will embark on a 52-week journey of intentional self-discovery to systematically test what truly works for your unique biology, personality, and goals. This isn't about blind faith; it's about data. Through a series of practical, low-stakes experiments, you will learn to ask the right questions and objectively measure the results: Energy & Body: Which leaves you feeling fresher—seven or eight hours of sleep? Do you get a better energy boost from a midday walk or a power nap ? Focus & Productivity: Is a creative mess or a decluttered desk your key to productivity ? What's the most effective method for organizing your life—a to-do list or time-blocking ? Mind & Mood: Does daily gratitude journaling or vent journaling have a greater impact on your mood ? What's more effective for stress relief—a cold or a warm shower ? Money & Lifestyle: Which payment method makes you more mindful of your spending—cash or a digital wallet ? Do experiences or possessions bring you longer-lasting happiness ? Relationships & Social: Which builds deeper intimacy in a relationship—sharing triumphs or sharing struggles ? Does scheduled or spontaneous time strengthen your bond more effectively ? By the end of your year-long journey, you will have moved beyond guesswork and created a personal "Life Operating System"—a definitive, data-backed playbook for living a more intentional, effective, and fulfilled life. Stop following someone else's rules. It's time to start writing your own.