With million dollar investments, Indians returning from around the globe and ofcourse the Prime Minister Narendra Modi's recent visit to the Silicon Valley, start-ups in India are catching the eye of many around the world. And while each start-up is thriving to be 'the next big thing', critics are of the opinion that the start-up space might be heating a tad bit too fast. How true is it? On Heads Up, we ask experts and entrepreneurs about do's and don't's of the start-up world.