It's always been said that hindsight is 20/20. We always know the right decision after we've already made the wrong one. We know what we should have done after the opportunity is already passed. But we don't get to go backwards in life. We don't get do-overs, so we end up feeling regret over missed opportunities and mistakes. Why do we miss opportunities? Why do we make mistakes? Well, ask yourself this question: what is your focus in life?