The last point is so true: "Pay no attention to Naysayers". Ofcourse it's important you take criticism and feedback from your surroundings but there are so many jealous people that they'll try to bring you down. They're used to seeing you in certain position and if that changes, jealously and envy sets in. That's what happened when I launched http://www.jivelo.com ,friends kept questioning the reasons and my goals. Simply put people don't understand "why" you're doing it. Drive, goals and ambition are hard concepts to explain