11 Major Mistakes Beauty Experts Wish You'd Get a Clue About

Rebecca Isa, the lead manicurist for Zoya at the Marchesa show, has one pet peeve when it comes to nails: filing. "Going back and forth tears the nail plate," Rebecca explained. "It should be corner to center in one direction."

If you see your nail tech starting to saw, stop her right away! Once the emery board is put away, make sure she buffs the free edge, too. Otherwise you'll have flyaways that will cause your polish to chip in a matter of days.