New Delhi, Oct. 15 -- Anupam Mittal, Shark Tank judge, recently remarked that one needs hustle to build a successful business. Suggesting that the roadblock to success is fear of rejection, he emphasised that one doesn't need consultants, market research or a fat bank balance to validate an idea.

Motivating and inspiring budding entrepreneurs "working on 0-1 journeys," the 53-year-old Shaadi.com founder shared 3 tips of startup playbook.

1. Spin up a WhatsApp group - He advised aspiring entrepreneurs to share a mock-up product shots with friends, family and random people and question: "What do you think?" The product shots can be generated for free with AI.

2. Expand the circle - Share the same mock-up in Reddit threads, Facebook group...