"Fuller brows are universally more youthful," says brow artist Sania Vucetaj, who counts Sarah Jessica Parker and Olivia Culpo among her clients. "They take you back to your youth before overdoing anything." Don't despair if you have over-plucked in the past, though. Simply fill in sparse areas with a brow pencil. The slanted tip and blending brush of Sania's Angled Mechanical Brow Pencil ($30; saniasbrowbar.com) make it easy to create an arch with natural-looking fullness. Also avoid putting creams, moisturizers or other lotions on your brow area. "They impede hair growth by clogging the follicle," notes Vucetaj.

Ill-Fitting Clothes

Unless you're going for an oversized look, frumpy clothes are never fabulous. "Getting your staple pieces - a classic jacket or a favorite black dress - tailored slightly to fit better makes you feel younger and look slimmer," says Harris. If a tailor isn't readily available or affordable in your area, Harris recommends going to the local dry cleaner: "You just need someone who can do inexpensive hemming or alterations."

Peachy Nails

Mauve manicures are obviously for grannies. But your go-to opaque peach or pink polish may have a similar effect: "It can make your skin look aged," says Jin Soon Choi, founder of JINsoon Nail Laquer. Instead, try a sheer glossy white like gray-tinged JINsoon Kookie White ($18; nordstrom.com) or creamy pink-and-white combo, Doux. "It's a modern version of a classic sheer pink, and is part of a trend that brightens skin tones," says the celebrity nail guru.

In the quest for a clear complexion, "oil" sounds like a dirty word. But cleansing with conventional, harsh products can dry out facial skin. Translation: It'll age you. (Worse, it can make skin over-produce oil. Teenage acne with middle-age crow's feet? No thanks.) When it comes to facial cleansers, those with fewer ingredients - and those that contain so-called "good" oils, such as S.W. Basics Cleanser ($22.49; target.com) - often get the job done better and keep skin plump and hydrated.