What practical advice does Sai Baba offer in the text for achieving spiritual welfare and peace of mind?

In Chapter 27, Sai Baba provides several pieces of practical advice for achieving spiritual well-being. He gave a female devotee a simple yet powerful instruction: to chant 'Rajaram, Rajaram' daily, assuring her it would lead to a successful life and a peaceful mind. Beyond specific mantras, the text urges a shift in focus away from worldly anxieties like how one will obtain food and clothing, which are seen as subject to destiny. Instead, one's effort should be directed toward becoming 'spiritually accomplished.' The ultimate path to this, as Chapter 27 concludes, is to awaken from the 'sleep of ignorance' and, 'becoming very humble, surrender at the Guru's feet,' trusting in the Guru's wisdom completely.