AGE IS NO BARRIER

Have you noticed something funny going on around the country? Everybody is growing older, but nobody seems to be aging.

Stephani Cook, who follows social and marketing trends for a New York City advertising agency, has seen it--and felt it. "People 50 to 75 don't think of themselves as old," says Cook, who is an executive vice president of Lowe & Partners/SMS. "I'll be 53 next month. My daughter just turned 29, and we have a lot more in common than not. We wear the same things and eat the same things, and I'm in better shape than when I was...