What is the key to overcoming laziness according to the teachings of Sai Baba, as seen through his devotees?

The provided text illustrates that a key to overcoming laziness is through dedicated and constant service to the Guru. A powerful example is Nanasaheb Nimonkar who, despite being over sixty years old, was always prompt in his service to Maharaj. As detailed in Chapter 0, "laziness or a desire for rest never touched him while serving Maharaj." He spent the last three years of his life in this constant service, going home only for essential daily rituals. This demonstrates that deep devotion and the act of serving can completely eradicate feelings of lethargy and the desire for idle rest.