“If you make a mistake, don’t spend precious time and energy trying to deny it or point the finger at someone else. Be a leader and own it, then spend your time and energy fixing the problem. As I’ve already noted, start-ups often fail because founders want to be seen as the smartest person in the room, which means not being wrong. Making a mistake is going to happen. None of us is perfect. But the difference between success and failure is how you handle that mistake.”