I’VE READ A LOT of retirement books touting the “keys to a successful retirement.” Some have great ideas. But I think they miss a key ingredient. My contention: To have a successful retirement, we need to start with a proper understanding of work. Admittedly, it’s a counterintuitive way of looking at retirement. But sometimes looking at a problem backward can help us find creative solutions. In other words, examine the opposite of retirement for lessons about retirement.