Mamaearth co-founder Ghazal Alagh shared three key lessons for startup founders based on her nine years of experience building seven brands. She advises prioritizing action over endless planning, launching products at 90% readiness to gather real feedback. Alagh also introduced the '85 rule,' advocating for consistent 80-85% effort to prevent burnout and ensure longevity. Finally, she stressed the importance of defining a personal 'why' or purpose, rather than imitating others' strategies, to guide a startup's journey.