In the year since her popular Showtime series, Weeds, got whacked, Emmy-, Tony-, and Golden Globe–winning actress Mary-Louise Parker certainly hasn’t been resting on her trophies. The single mom to William, 9, and Aberash, 6, has not only cranked out four major films—two of which, Red 2 and R.I.P.D., hit theaters this summer—she’s also preparing a return to Broadway this fall in a new World War I drama, The Snow Geese. We caught up with the multitasking 48-year-old after she dropped off her kids at school, and reaped some of her wisdom on what she does to keep looking and feeling so young. —MALLORY CREVELING
"When I’m in LA, I always try to fit in a hike, because it’s so nice to be outside. At home in New York City,…