A deep red polish is like a good wool cap for Fall: it's something you always wear, but you're always looking for the next best one. Enter Formula X For Sephora in Obsessed ($11). Not only is the deep merlot color clutch for the upcoming season, the formula is actually one of a kind. A luminescent ingredient enhances shine and revamps color, giving it an incredible sheen. And for those of us who are less than patient (ahem), it's quick-drying, so you don't have to use your blow dryer as a makeshift polish hardener. The result is a finish so smooth, so flawless that you'll be staring at your nails all day. Who needs a professional manicure when you can get saturated color at home?