It’s an unsettling reality that most new ventures fail — 70 to 80 percent if you’re measuring success by projected return on investment, according to Harvard Business School. You jump in head first with full confidence and high hopes — and then you fall flat on your face so hard that it hurts. What’s an up and coming CEO to do? You get right back up and try again — that’s a lesson you learned when you were five years old. Rest assured that the same principle holds true today.