Margaret Dell is 96, but you'd need to check the birth date on her driver's license to believe it. Sporting a baseball cap with a Harley-Davidson logo on it, she is the designated driver for her seventy something friends who no longer feel comfortable behind the wheel. Last winter a snowfall threatened to keep her from her appointed automotive rounds. She took a shovel and cleared a path to her car. Driving keeps Dell young. That and knitting. She constantly knits. She makes baby booties and caps and blankets for friends and family whenever a baby arrives--the newborn getting an early blessing from the ageless. And every month, she donates several blankets to a charity for unwed mothers. Driving, knitting ... and tennis. She plays two or three times a week. She has a much younger doubles partner who "covers the court. I'm a little afraid to run too much because of the circulation in my legs," she explains.

TIME Magazine: How To Live To Be 100

Link from Mike Duffy (a non-knitter) :)