"A good fake tan is like a little black dress," says N.Y.C. tanning specialist Anna Stankiewicz. "It makes you look thinner." Exfoliate, then spray on a thin, even layer of self-tanner. Look for a can with a nozzle that works at any angle (like St. Tropez Self Tan bronzing spray, $35; sttropeztan.com) so you don't miss a spot.