18 Fashion and Makeup Mistakes That Age You

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Dressing too trendy

Unless you're on an unlimited budget, steer clear of fashions that seem very in-the-moment, advises New York City-based celebrity wardrobe stylist Alana Kelen; you won't be able to wear them for very long before they (and you) look dated and behind the times. "Rather than invest in pieces that may be passé by next season, stick to classic, sophisticated items that will stand the test of time," she says. That doesn't mean you can't infuse some edgier styles into your wardrobe, though. "Look to trends that are here to stay: leather, military, dark florals, plaid, and slimmer cuts such as tailored pants and pencil skirts."

Next: Being nostalgic about clothes