Rajan Singh has lived many lives in one. His academic portfolio includes an undergraduate degree from IIT and an MBA from Wharton. He has also served in the Indian Police Service, had a stint with McKinsey, and worked as an investment professional with a private equity fund.  And there's more. Rajan is an entrepreneur now and as the founder of HabitStrong, he’s on a mission to help people build life-changing habits. Gurudev caught up with Rajan to find out how he’s managed to put together such a diverse resume and the mental models he uses to demystify habit building.