We've all had those scary moments when we're cruising on the highway and suddenly realizing we're driving a little too close to the road's edge or another vehicle. Emergency lanes and buffer zones are there for a reason. They provide drivers with extra room and a little time to correct themselves before something terrible happens. Managing money is no different. To reach your destination safe and secure, you need the financial equivalent of seat belts and airbags in place. Do you know how you'd handle an unexpected medical emergency if it came up today? How many months would you be able to keep up with your mortgage if you were to suffer a layoff from your job next week? There's no such thing as an emergency-free life. And when inevitable troubles come up, you can't afford to face them without the shock-absorbing power that can only come from consistent budgeting, wise investing and a big, healthy emergency fund. How can you tell if you might be living to...