Agnes P. saved every penny she could for retirement. Now at 78, she’s got more money than she knows what to do with, but fewer happy memories than she’d like. “I was so focused on saving that I forgot to actually live,” Agnes said. Her story shows why being too frugal can backfire. Her entire life, Agnes watched what she spent. Growing up without a lot of money instilled the idea that she had to save every penny. She packed lunches, kept her old car, and rarely took time off. While her friends were taking vacations, Agnes put every extra...