He who meditates on the Supreme Personality of Godhead, his mind constantly engaged in remembering Me…is sure to reach Me.
…In this verse Lord Kṛṣṇa stresses the importance of remembering Him. One’s memory of Kṛṣṇa is revived by chanting the mahāmantra, Hare Kṛṣṇa. By this practice of chanting and hearing the sound vibration of the Supreme Lord, one’s ear, tongue and mind are engaged. This mystic meditation is very easy to practice, and it helps one attain the Supreme Lord. (from purport to Bhagavad-gita 8.8)
How Often Should we Chant
Guest: How many minutes do you recommend a day? How many minutes do you chant?
Prabhupāda: Constantly, without any cessation. Is it very difficult? You can chant while you are walking in the street, “Hare Kṛṣṇa.” Who checks you? There is no tax, there is no price, and if there is some gain, why don’t you try it? If there is any gain by chanting Hare Kṛṣṇa, oh, it is better to give it a trial. We are not charging anything; the government is not taxing anything. You can chant: Hare Kṛṣṇa, Hare Kṛṣṇa, Kṛṣṇa Kṛṣṇa, Hare Hare/ Hare Rāma, Hare Rāma, Rāma Rāma, Hare Hare. Just see the result. At least for one week you chant. It is very nice thing. One does not require to be highly educated or very rich or very beautiful or very famous. No. Anyone. Anyone. Simply God has given us this tongue, we can vibrate nicely. Chant Hare Kṛṣṇa, just see the result. I think one of our students, Śrīman Hayagrīva brahmacārī, he will give you a nice experience, when he first came here in this class and chanted on the way, how did he feel. There are many instances. Yes. So our only appeal to you, all people of the world, that we are embarrassed with so many problems. So we say this is the only solution. There is no price; there is no tax; there is no, I mean to say, imposition of previous qualifications. Simply chant Hare Kṛṣṇa. This is our propaganda. And see the result. Sixteen words: Hare Kṛṣṇa, Hare Kṛṣṇa, Kṛṣṇa Kṛṣṇa, Hare Hare. And… On the whole, there are three words only: Hare, Kṛṣṇa and Rāma. So these three words, they are nicely set up in sixteen words: Hare Kṛṣṇa, Hare Kṛṣṇa, Kṛṣṇa Kṛṣṇa, Hare Hare/ Hare Rāma, Hare Rāma, Rāma Rāma… So we request everyone to chant this transcendental vibration and see the result. There is no question that you have to change your religion, you have to change your dress, change your occupation. No. Simply go on chanting. (from lecture on the Srimad Bhagavatam 7.9.10 July 9th 1968)
The Hare Krishna Movement 