Lord Caitanya Mahaprabhu practiced  kirtan , or chanting. One should always chant the name of the Lord, because the name of the Lord and the Lord are not different. Lord Caitanya's instructions to always chant the name of Krsna and Krsna's injunction to remember Him always are not different. The Lord and His name are not different from each other. In the absolute status, there is no difference between one thing and another. Since the Lord is absolute, there is no difference between His name and Himself: He is omnipresent. We should know Him always, twenty-four hours a day. How is this possible?
A very crude example is given by the great teachers: it is like a married woman who is in love with another man. Such an attachment is necessarily very strong. Now, the woman always wants to show her husband that she is busy in family affairs so that he won't suspect her having a lover. However, she is always thinking of her lover, although she carries on her household duties well—in fact, with greater care than she might if she had no lover. In the same way, we must establish our love for the Lord and carry out our duties well.
Krsna did not advise Arjuna to go off to the Himalayas to practice yoga. When the Lord described the system of yoga to him, Arjuna declined, saying that it was too difficult for him. But then the Lord said that one who thinks always of Him is the greatest yogin, the supermost seer, and the best devotee. The Lord said, "As a warrior, you cannot give up your fighting; but devote all your actions to Me." He also says that if one is completely surrendered to Him there is no doubting.
One has to learn this process of Krsna consciousness. To do so, one should approach a person who is fixed firmly in this consciousness. The mind is always flying from this thing to that, serving no real benefit. One must learn to fix the mind always on the Supreme Lord. The mind is very restless and difficult to manage, but one can concentrate the ear on the sound of Krsna. The Supreme Personality of Godhead can be approached by one who is constantly thinking of Him in this way.
These processes are given in  Bhagavad-gita . No one is barred from them. Hearing of Lord Krsna is possible for everyone, even a human being in the lowest status of life. Laborer, tradesman, or woman—these are counted in the category of less fully developed intelligence; but the Lord says that even one lower than this—anyone, in fact, who accepts this principle of devotional service and accepts the Supreme Lord as the highest goal of life, can approach the perfection of human existence. This is the one permanent solution of life.