Go and read this excellent post about preventative healthcare. Then come right back here. I want to add a couple more points that are more applicable to the already-an-exerciser reader.
For those of you who already eat well and exercise frequently (particularly those who weight train) might I also suggest a little preventative maintenance of another type?
Regular foam rolling and massage therapy.
Just because you aren’t feeling any pain doesn’t mean that your body is working efficiently. Strength training without adequate stretching and myofascial release (‘unsticking’ the muscles from the surrounding ligaments and tendons) can lead to tight muscles and compensatory imbalances.
Over time, those imbalances may increase your risk of injury and lead to chronic pain.
Think of stretching and massage as deposits in your wellness bank!