Find a fiduciary advisor today. For example, say that you’re married and in your late 50s. You and your spouse have a 401(k) with $1.6 million and are building toward a strong retirement.

I’m in my late 50s with a respectable (not enormous) nest egg — but I’m skeptical of the ‘4% rule,’ so how else can I safely withdraw money in retirement without going broke? Running out of money in ...