The Krishna consciousness movement is chiefly engaged in chanting the maha-mantra all over the world. Sri Caitanya Mahaprabhu introduced the congregational chanting of the Hare Krishna mantra to give everyone a chance to hear Krishna’s holy name, for simply by hearing Hare Krishna, Hare Krishna, Krishna Krishna, Hare Hare/ Hare Rama, Hare Rama, Rama Rama, Hare Hare, one becomes purified (ceto-darpana-marjanam).
Chaitanya Caritamrta Antya Lila 20.12 – Purport
One must read Srimad Bhagavatam regularly and with scrutiny to gradually become attached to the chanting of the Hare Krishna maha mantra.
Purport on Chaitanya Caritamrta Adi Lila 7.73
Building a big temple is a big endeavor. It's for preaching Krishna consciousness. But another preaching is to show – not only show, but to provide the facility by which people can live simply and chant Hare Krishna without any big burdens.
Lecture on "Living without Electricity" – Salem – 26th Nov'07
If we have the intention to chant Hare Krishna, then this simple way of life is overall more conducive.
Lecture on "Living without Electricity" – Salem – 26th Nov'07
Prabhupada was asked, “When the mind is drifting, what should we do?” Prabhupada said, “Chant loudly!”
Lecture on "Srila Prabhupada Gave Us Everything" – SB 3.5.51 – 31st May 1996
I’ve seen in the villages in Bengal that now they have electricity and now they have TVs. But previously in the villages, you go in the village and after dark what do the people do? They chant Hare Krishna. What do you have to do after dark? Most of the people would chant Hare Krishna for hours; they had that habit.
Lecture on “Simple Life on Farm Communities” (Pula Farm, Croatia, 20 October 2000)