1They choose to have healthy relationships
One of the most realistic advice you could ever hear is to be very, very wise when it comes to the people you choose to let into your inner circle of friends. You can make good money and you can travel the entire world, but if you are surrounded by bad people, you will never reach the ultimate happiness.
Moreover, and according to a research that lasted for 80 years, the happiness we get from our relationships has a powerful impact on our health. So choosing wisely and smartly who to be around is another form of taking care of yourself. too.