What are some practical ways to serve a Sadguru like Sai Baba and foster a community of devotees?

Based on the preface in Chapter 0, a Sadguru accepts service from devotees in two primary ways involving books. The first is when they create great works themselves, and the second, more relevant for devotees, is by having their biographies written. A significant way to serve and build a community is through the study and performance of Parayans, or devotional readings, of these detailed biographies. When devotees study and perform Parayans of a Guru's biography, the writer performs Guru service, and the other participating devotees also achieve their life's purpose, creating a shared spiritual practice. This act is described as gaining the merit of serving God in humanity and as a form of public service.