According to Vishnu Purana, King Sagara asked Sage Uddhava to enumerate the Acharas, practice or custom that Vaishnava devotees must follow to attain moksha or liberation. Sage Uddhava enumerated the following:
To get up early in morning. Do purification of the body and worship Srihari Vishnu and his incarnations as per one’s means.
To recite the name of Lord 108 times.
Apply religious mark or tilaka. Wear rosary made of tulsi beads.
To read a portion of scriptures like Bhagavad Gita or Srimad Bhagavad Purana.
To eat or drink food only after offering to Lord Vishnu. Meat and Liquor are prohibited.
Strictly observe principles of moral conduct.
Repetition of Gayatri Mantra.