So, you have your own startup idea you can't get it out of your mind. How do you bring it to life?

During InnovFest unbound, an event in Singapore that connects startups with corporates, CNBC asked three entrepreneurs who built their own businesses how they got started. The roster included Malcolm Rodrigues, CEO of MyRepublic, an internet services provider; Shaul Olmert, CEO of online publishing platform Playbuzz; and Steve Melhuish, co-founder of PropertyGuru, a real estate listings platform.