Health. This will ultimately allow you to feel good about yourself overall and benefit you in the long haul. It stacks up your durability and survivability traits. It adds confidence and happiness almost naturally.
Time. Cause you can't buy more or get it back. What you do with your time is the most important thing in life. It's literally priceless.
Purpose. I'd venture to say that 90% of people or more never find their true purpose in life. 9/10 people have no real drive to push beyond what they have, to truly chase a dream or ambition. Having a purpose defines you as an individual and brings true meaning to why you are here.
I love my family and friends but if you are not good than they are not good. The better you are, the better they are. The only person you can truly rely on 110% without fault in this life is yourself. I've seen people in my life constantly try to help and care for family and friends around them. All it got them was stung and in the same place they started off. Not saying it's always like that, but people truly need to put way more emphasis on themselves.