4 Retirement No-Nos That'll Cost You $250,000

We tend to think the mistakes that derail retirement are the ones that are inflicted on us: an investment that implodes; an adviser who dupes us; a market crash that decimates our nest egg. In fact, the costliest errors are ones we make ourselves, often without realizing how much damage we’re doing. Here are four of the biggest, plus tips on how to avoid them.