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Mistake #3: Wearing Deep, Dark Lip Colors

A dark color makes any surface look smaller—a welcome illusion perhaps on your hips but not your lips. To make your mouth look fuller (one hallmark of a youthful face), choose bright lipsticks and glosses (peaches, pinks, vibrant reds) over deep shades (burgundies, wines, browns). Makeup artists use another trick to create the illusion of luscious lips: Before applying color, trace a highlighter pencil along your upper lip line, then buff it out with your finger. (Try Ben Nye's Highlighter Pencil in Nude, $8;