I will give you a few hints:
It only takes 30 minutes a day.
It reduces the risk of heart disease, diabetes, obesity, arthritis, and the list goes on
It lowers anxiety and depression.
It improves your mood and fights fatigue.
It gives us the biggest return on investment, both time and money.
It improves your quality of life!
What is this miracle I speak of? Check out the video:
Exercise. Especially WALKING!