We frequently find ourselves looking at what the next significant investment should be. A house? Stocks? Property? We work tirelessly to find out what will give us the best return on our investment. We fail to see and look in the mirror and realize that the best investment we can make is ourselves. You will always get the most significant return when you bet you. What is your mental health worth? What is your fitness worth? What is being able to have babies and/or run with your grand-babies w...