Vishnu-tattva

“Hearing and chanting about the transcendental holy name, form, qualities, paraphernalia and pastimes of Lord Vishnu, remembering them, serving the lotus feet of the Lord, offering the Lord respectful worship with sixteen types of paraphernalia, offering prayers to the Lord, becoming His servant, considering the Lord one's best friend, and surrendering everything unto Him—these nine processes are accepted as pure devotional service…” (Prahlada Maharaja, Shrimad Bhagavatam, 7.5.23-24)