There are six principles favorable to the execution of pure devotional service:

utsahan niscayad dhairyat

tat-tat-karma-pravartanat

sanga-tyagat sato vrtteh

sadbhir bhaktih prasidhyati

(1) Being enthusiastic,

(2) Endeavoring with confidence,

(3) Being patient,

(4) Acting according to regulative principles [nine processes of devotional service such as sravanam kirtanam visnoh smaranam pada-sevanam arcanam vandanam dasyam sakhyam atma-nivedanam –(A). hearing the name and glories of the Supreme Personality of Godhead (B). chanting His glories (C). remembering the Lord (D). serving the Lord's feet (E).worshiping the Deity (F). offering obeisance’s unto the Lord (G). acting as the Lord's servant (H). making friends with the Lord (I). surrendering oneself fully to the Lord ],

(5) Abandoning the association of nondevotees,