Guardrails on the highway make up a system designed to keep vehicles from straying into dangerous or off-limit areas. They're everywhere, but they don't really get much attention . . . until somebody hits one. And then, more often than not, it's a lifesaver. Ever wonder what it would be like to have guardrails in other areas of your life—areas where culture baits you to the edge of disaster and then chastises you when you step across the line? Your friendships. Your finances. Your marriage. Maybe your greatest regret could have been avoided if you had established guardrails.