Recent data shows that U.S. startup failures have increased by 60% in the past year. And every failed product or company carries a price: wasted resources, lost jobs, tarnished reputations. To understand more about risk-taking and failure, Sean Jacobsohn has catalogued more than 1,000 failed products and businesses in a collection he calls the Failure Museum. He has identified six warning signs of failure, and offers lessons to ensure entrepreneurs learn from these mistakes.