Get a handle on the latest nail art designs and click through the best fashion week nail trends for 2015 with our comprehensive guide to all things nails. Tips from celebrity manicurists reveal how to paint nails like a pro, from shaping and filing to treating cuticles. Plus: Discover the hottest nail polish color trends of the season, and find the most flattering lacquer shades and top-rated manicure kits to upgrade your mani at home.