J.Crew CEO Mickey Drexler started his career as a Bloomingdale's buyer some 40 years ago. Today at WWD's CEO Summit, the "man who dressed America" shared some pretty valuable life lessons. His caveat? "Most of what I say relates to the fashion retail business, most of what I say does not pertain to startup business." Still, we say you'll get something out of his talk, no matter what you're currently working on.