My great-grandmother was a vaudeville comic and lived to 96. Here are her secrets to longevity.

Courtesy of Melissa Hart

At 54, I've reached the age my great-grandmother was when she stood onstage at county fairs in a red satin gown, tossing juggling clubs to my great-grandfather on his tightwire and setting up punchlines for his jokes. She'd experienced a lifetime full of glamourous international travel; she'd live another 42 years, thanks — she said — to a couple of secrets.