By doing what you can to maintain your physical and mental health you will more likely enjoy having a mind and a body and be able to be of service to others.
By reflecting upon what memories you would like have when you look back at your life you may find out what is important to you and you will be able to take deliberate steps towards creating those memories.
By taking care of the environment you will be a guardian of life and beauty and making it possible for future generations to enjoy living on our planet.