The two basics to survival, good food and exercise, that can have such an impact on all areas of our life.
Becoming better at choosing healthy options for life.
Your body is amazing in its ability to self correct. It is your temple and the only house you have to reside in, so you need to take good care of it.
Try to get moving anyhow, that is all that is required and then just improve upon it daily whatever your age.
Have goals that fuel direction for life.