BMI and Waist Circumference
Putting aside vanity or any preconceived notions of what a person should or shouldn't look like, maintaining a healthy weight is a lifesaver. In fact, keeping your weight in check helps lower your risk of heart disease, cancer and stroke [source: Mayo Clinic]. Even if you don't care about any other reasons to maintain a healthy weight, this should do it for you.
So how do you determine if you are a healthy weight? Have your BMI -- body mass index -- and waist circumference measured. BMI is an indicator of your body fat achieved through a calculation using your weight and height. Different BMIs indicate whether you're underweight, normal, overweight or obese. You can run the calculation online at the National Heart Lung and Blood Institute Web site.
In addition to BMI, Cathy Becker and Raquel Hecker for ABC News suggest pulling out a tape measure and letting your waist circumference give you an idea if the weight you are carrying around your middle is an issue. A measurement of more than 40 inches could indicate increased risk for heart disease [source: Becker, Hecker].