In January, Medinas Health CEO Chloe Alpert won $1 million at the WeWork Creator Global Finals. Her big idea? A data-driven marketplace that aims to help healthcare organizations resell and purchase medical equipment and supplies. (By some estimates, the U.S. healthcare system wastes about $765 billion a year.) Alpert shares her strategy for a winning pitch, how to surround yourself with a team that complements your strengths and weaknesses and how to disrupt a relatively traditional industry.