Nice girls don't gnaw their nails, I'm sure- but I can't stop myself.

Nibbling's one of my nasty habits, too, and I've tried - and failed - with nail polishes that taste bad and even hypnosis. What has worked: getting a beautiful manicure I can't bear to spoil. "You really need to make your nails less tempting," says Joanna Czech of New York City's Sava Spa. "If they're perfectly polished, you won't want to bite them." And while you're waiting for your tips to grow, strengthen them by popping a iotin supplement daily, so they're less apt to break and trigger a feeding frenzy.

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