We all want beautiful healthy hair. Here are some ways to keep it beautiful and strong. Water makes up about 30 percent of the composition of your hair, according to the University of Southern California, so keeping it hydrated gives it that shine. Use a moisturizing shampoo, even if you have oily hair. Water helps keep hair strong as well as flattening down the shingle-like surface of the hair shaft. Drink enough water every day to help keep your hair hydrated.