Now approaching 50 itself, AARP is heading off a midlife crisis with a new TV ad that celebrates the aging process to the strains of the Buzzcocks' classic punk song "Everybody's Happy Nowadays." The image overhaul, aimed in part at future AARPers now in their 30s and 40s, is part of a long-running effort to reposition the organization formerly known as the American Association of Retired Persons (it has gone by just AARP since 1999) as one devoted to vigorous, working people who are 50-and-up. There is a lingering perception that AARP is a retiree organization," said Emilio Pardo, AARP...