Taking care of your health never gets old. As we age, it’s important to maintain healthy habits — including proper nutrition, regular exercise and quality sleep — and to follow recommended preventive care, such as cancer screenings and vaccines. Keeping it simple, here are the two key things women should do each decade to stay healthy. 20s Find a doctor who treats adults Internists generally start seeing patients between the ages of 18 and 25.  At these visits, you’ll undergo a physical and