If an airplane departs on a path even a few degrees off of its intended route, it could end up hundreds of miles from where it's supposed to land. The difference gets worse the farther the plane flies. Planning for your retirement is much the same. You need to know your starting point and destination, and plan for any number of variables in between, as well as have a plan to keep you accountable if you start to veer off course. In The Retirement Flight...