Habit expert Charles Duhigg reveals how the habit loop—cue, routine, reward—lets you rewire destructive behaviors without willpower. Sam Parr credits Duhigg's framework with overcoming a 20-beer-a-day drinking habit by substituting M&Ms for alcohol, then replacing that with keystone habits like sleeping in workout clothes. The conversation covers how 40-45% of daily actions are automatic, why systems trump willpower at scale, and the three core skills of super communicators: asking deep questions, matching conversation types, and proving you're listening. About 40-45% of daily behavior operates as habit; neural pathways thicken with repetition, making habits persist even after extinction attempts, so replacement rather than elimination works.