As skin starts to lose elasticity and sag, shadows form. Look more luminous by applying white eye shadow to four key points: the inner corners of the eyes, the brow bones, the temples and above the peaks of your upper lip, says Darac, a celebrity makeup artist in New York City. Light skin tones look best with a white shadow that has cool blue undertones; darker complexions need a complementary golden or off-white version. (A pick that's flattering on everyone: Peter Thomas Roth Anti-Aging Eye Illuminator, $28, peterthomasroth.com.)