Introduction

Lisa Allen's life was a mess. At 34, she was overweight, in debt, and struggled with smoking and drinking. But with an incident where she tried to light a cigarette and accidentally burned a pen instead, Lisa hit rock bottom. In that moment of despair, she made a decision: she had to quit smoking!! And changing this one habit led to a complete lifestyle overhaul. This "keystone habit" had rewired her brain.Lisa's keystone habit gives us a glimpse of how...