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Anyone who has lived a long life has at least a few regrets. And for millions of baby boomers, some of that remorse centers on how they planned and saved for retirement. Recently, the Nationwide Retirement Institute surveyed 1,000 U.S. consumers between the ages of 60 and 65 — including both retirees and pre-retirees — and asked them what advice they would give their younger selves about…
