Retirement, lived to its best potential, is synonymous with freedom. The freedom to do what you want when you want with whomever you want. Whether that's travel, grandkids, volunteering, hobbies, or some combination, is up to you. You make your own rules.Yet, on top of all of the decisions about how you will spend your newfound leisure time, you must first buy yourself this time, in a rather literal sense. How will you pay your bills? How can you...