We are all living longer lives now, so this extra longevity gives us second, third or fourth chances to succeed at something or change careers. It is great to think big, but the formula for success in our time is also to THINK LONG. There is a huge waste of talent out there because people think they are 'too old' or 'too late'. Actually, if you take the span of productive life from 20 to 80, at 50 you still have 50% of productive years ahead of you.