Beyond mantra chanting, what other forms of devotion and service does the scripture recommend for attaining liberation from worldly existence?

The scripture outlines a path of complete surrender and service to the Sadguru. Chapter 1 teaches that one should dedicate their entire life, including body, mind, and wealth, with full devotion at the Guru's feet. This involves physical acts like bowing the head and serving his feet, as well as sensory devotion like looking at his face and hearing his virtues. The text emphasizes constantly meditating on Sai’s form with the mind and heart, stating this will break the bond of worldly existence. This complete service is equated with traditional practices like Yoga, sacrifices, and penance, presenting it as the most direct path.