Medical offices might have gone high-tech, but some of the advice you'll hear there these days rings more nostalgic: Complain of constipation or congestion and you may get an Rx for dried plums (née prunes) or a saltwater gargle. "The more that old remedies pan out in studies, the more likely physicians are to suggest them," said Dr. Philip Hagen, vice chair of the division of preventive medicine at Mayo Clinic. "Part of the drive is the cost of health care—trying these at home could save you a trip to the doctor." Consider these golden oldies the next time you're...