Formula to make life successful

[Bhakti Vikasa Swami]

This verse gives the sum and substance of devotional life. One must first
become a servant of the servant of the servant of the Lord (dasanudasa). Sri
Caitanya Mahaprabhu advised, and He also showed by His own example, that a
living entity should always desire to be a servant of the servant of the
servant of Krsna, the maintainer of the gopis (gopi-bhartuh pada-kamalayor
dasa-dasanudasah [Cc. Madhya 13.80]). This means that one must accept a
spiritual master who comes in the disciplic succession and is a servant of the
servant of the Lord. Under his direction, one must then engage one's three
properties, namely his body, mind and words. The body should be engaged in
physical activity under the order of the master, the mind should think of Krsna
incessantly, and one's words should be engaged in preaching the glories of the
Lord. If one is thus engaged in the loving service of the Lord, one's life is
successful.

Srila Prabhupada's purport to Srimad-Bhagavatam 6.11.24