Odds are you're not going to wash your face after every time you go outside. (Nor would your dermatologist want you to -- you'd dry out your skin and damage its protective barrier.) However, Luftman has a trick that's much more doable: Use a thermal water mist. "Spray that on top of your skin throughout the day," she says. "It can help negate some of the pollution." She suggests Avene Thermal Spring Water, $9. For even more anti-aging benefits, I like Tata Harper Hydrating Floral Essence, $65, which has jasmine and hyaluronic acid for added moisture. (There's currently a limited edition rose version available that's even more phenomenal.)