A recent University of Phoenix survey showed that 63% of 20-somethings have a strong desire to start a business. That’s a great first step: desire. But what else does it take to start a business that is sustainable? Since 1999, right around the time many of these 20-somethings were born, I’ve started seven businesses. Five of them failed. In that time, I’ve learned from experience what it takes to be a startup founder.