Another lesson from "Without a Doubt" is the value of listening to customers. Surbhi’s company, nVision Medical, was founded on the basis of solving a problem she faced herself as a patient. By truly understanding her customers' needs and pain points, she was able to develop a product that addressed those issues uniquely.

Finally, Sarna stresses the importance of surrounding oneself with supportive people who share your vision. Building a successful business requires collaboration and teamwork, and having a strong support system can make all the difference in overcoming challenges along the way.

Overall, "Without a Doubt" offers practical insights into what it takes to be a successful entrepreneur in today's ever-changing landscape.