The age-fighting ingredients most important to Wechsler are "prescription topical retinoids, such as Tretinoin (Renova, Retin-a), the gold standard in anti-aging. [They] treat surface fine lines and wrinkles, brown spots, thicken skin, prevent basal and squamous cell skin cancers," she says. "I use the lowest strength, but can't use it every day because of my very sensitive skin."

"You really have to practice safe sun," Fields says. "The hat I wear has a large round brim with a tail at the end. Not cute, but it really works. A baseball hat is pretty useless. It only covers the forehead and your nose. Safari hats found at sports stores are a better bet," she says.

"Eat water, don't drink it," Murad says. "The idea of drinking eight glasses of water is a fallacy, the water doesn't stay where we need it to stay," he says. Instead of drinking more water, which Murad says will just send us to the restroom more often, he recommends eating plenty of raw fruits (three or more servings a day) and veggies (five or more servings a day), which will also provide essential anti-oxidants and anti-inflammatory properties.

Rodan avoids jogging and other "pounding exercises," she says. "The force of gravity makes skin loose elasticity. If you can feel your face flopping around, it's not good," she says.