Perhaps you're determined to stop biting your nails or peeling off your gel polish (it's a hard habit to break, I get it). Or maybe just want to maintain your nail health (yes, please!) or learn how to fake a just-from-the-salon type of mani (also yes). Whatever the case, you'll want to put nail pro (and Sally Hansen's Global Color Ambassador) Madeline Poole’s advice into action asap. Here, 12 things you need to stop doing to your nails now to keep them in tip top shape . . .