At first visualize a picture or representation until the visualization skill is developed. A sound, word, or phrase is repeated over and over again at the same time as the visualization. This sound, word or phrase is called a mantra. Although it appears simple, Bhakti YOGA requires thorough discipline and training of one's will and mind. It can be achieved by following the eleven fundamental factors that Sri Ramanuja had prescribed.
Bhakti yoga is to be performed under the guidance of a spiritual master.
One must chant Hare Krishna and following certain regulative principles , such as avoiding meat, gambling, illicit sex and intoxication.