Your LifeAn article in the New York Times about Oprah Winfrey and the declining readership of  O, The Oprah Magazine, her 12-year old publication, stopped me in my tracks.  Here’s the paragraph that leapt off the page and gave me my own “Aha!” (but not in a good way) moment: Ms. Winfrey wants that audience for the magazine, but she wants its readers to be younger. The median age for O readers is 49, according to data tracked by the audience …