If you think of Krsna in various ways favorably — how to serve Krsna, how to decorate Krsna, how to give Krsna a nice place for residential quarter, temple, how to preach Krsna's glories — in this way, if you think, that is Krsna consciousness. Anukulyena krsnanusilanam bhaktir uttama. That is first-class bhakti, how to serve Krsna.

(From Srila Prabhupada's lecture on Srimad-Bhagavatam 3.26.46 — January 21, 1975, Bombay)