I have pondered you question for a while now. Here is an answer that applies to me and where it comes from:
The following is a statement from my personal mission statement written over 25 years ago. The surprising thing is that I have fulfilled all of the goals in this statement except this one:
*Service–I will help at least 1,000,000 people to approach their physical, spiritual,financial, mental and social pot entail.
It has come to me that the only way I can finish off this goal is through writing and selling books and through the internet. I believe that a membership and coaching program is the way to do this.