With your sunglasses, that is. The skin around your eyes is delicate and thin, meaning that lines tend to pop up there first. It's also the area most of us tend to neglect when applying sunscreen. By wearing oversize shades with UVA and UVB protection, you're giving your skin an extra shield of protection. Plus, with sunglasses on, you'll squint less in the bright sunlight -- resulting in fewer forehead wrinkles.

Need an instant anti-aging boost? Studies have shown that women who wore perfume with notes of grapefruit were perceived to be five to 10 years younger than they actually were. Try Commodity Goods Mimosa Eau de Parfum or Jo Malone Grapefruit Cologne.

Yes, even if you're past your acne-prone years. As you go about your day, your face picks up environmental debris, like dirt and other pollution-related skin saboteurs. Who wants to sleep with that plus makeup sitting on their face? Not only is it icky to think about, some of these particles can actually get into your pores and speed up the aging process. (You can read more about how pollution affects your skin here.)

Have you ever heard the phrase "worrying will give you wrinkles?" Turns out, this is pretty accurate. Stress damages your cells, which leads to premature lines and wrinkles (among other things).

Sometimes your day/week/month/year feels too busy for anything remotely resembling a social life. Meeting up with friends and "bonding" not only helps relieve stress; it can also keep your brain healthy as you age.

You can also unwind sans company by taking some "me time" -- experts say that incorporating soothing rituals into your routine can help diminish stress.

It isn't always your skin that shows the signs of aging. Dull, lackluster hair can be another dead giveaway to your age, and can make you appear older than you are. Keep your hair shiny, smooth and soft by using a nourishing hair mask, like Kerastase Masque Densite, $62, once a week.