According to Karl Chong — co-founder of Groupon Singapore, which was acquired by Groupon in the US for a rumoured US$24 million — the greatest lesson he has learnt is not to take no for an answer. “If you truly feel passionate about your newly introduced service or product, then you need to keep pushing forward with it until you get your first yes,” he says. More recently, the entrepreneur launched GoFresh, an Internet grocer with a free, next-day-delivery service. His idea of transforming laborious grocery-shopping into a convenient and user-friendly experience has paid off with GoFresh now selling 150 different varieties of fresh meat, seafood and vegetables. Chong is also an angel investor in several start-ups in the e-commerce and healthcare markets. One that he is particularly excited about is his investment in an assisted living facility for the elderly that will soon be launched. In his spare time, he sails, surfs and volunteers at non-profit organisations to teach underserved youth how to build their own start-ups.