They should preach the principles of Bhagavatam by (a) karma-yoga, or doing everything for the satisfaction of the Lord, (b) regular hearing of the Srimad-Bhagavatam from authorized persons or realized souls, (c) chanting of the glories of the Lord congregationally at home or at places of worship, (d) rendering all kinds of service to bhagavatas engaged in preaching Srimad-Bhagavatam and (e) resid