Everyone has bad hair days. But if you know a few style secrets, there are plenty of ways to have a great hair day. Your hair may be long or short, straight or wavy, frizzy or flat, oily or dry--but whatever its length, texture, and type, you can make it shine. Discover the healthy habits that will help your hair look its best. Figure out which styling products and tools are right for you. Find out about the cuts and styles that work well for your...