What are some of the different ways devotees serve Sai Baba as mentioned in the text?

As illustrated in Chapter 3, Sai Baba engages his devotees in various forms of service and worship according to their individual capacities. The text mentions that through some devotees, He had temples and monasteries built. Others were engaged in the joy of kirtan, or devotional singing, while some were sent on pilgrimages. More personal forms of devotion included performing worship with respect and massaging the Guru's feet. For the author himself, his designated service was the great task of sitting down to write the sacred life story of Sai, showing that the path of service is unique to each devotee's relationship with Baba.