
I started my business career 30 years ago. I would have never thought back then, when I kicked everything off, that I would work for a large corporation, start three companies and an angel investment fund, become a small business author, motivational speaker and consultant, be fired, kicked out by my partners, and go out of business more than once. It has been a crazy ride, but with age, and all those ups and downs, comes experience—and with experience comes a little bit of wisdom. Here are 10 lessons I wish I had learned before I was 40.