Chanting of the Hare Krishna mantra is the easiest process of meditation in this age.
Srimad Bhagavatam 4.8.53,
In this age, therefore, the only practical yajna is sankirtana-yajna, or chanting of the Hare Krishna mantra twenty-four hours a day.
Srimad Bhagavatam 4.13.25
Sri Chaitanya Mahaprabhu has inaugurated the Hare Krishna Movement, which is not different from Krishna, the Supreme Personality of Godhead. If one associates with this Movement, he directly associates with the Supreme Personality of Godhead. People should take advantage of the chanting of the Hare Krishna mantra and thus gain relief from all the problems created in this age of Kali. — Srimad Bhagavatam, 09.24.56.
Chanting Hare Krishna increases the ocean of transcendental bliss.
The Quest for Enlightment, Chapter 1,
Let people chant the Hare Krsna mantra constantly. Then their demoniac tendencies will be killed, and they will become first-class devotees, happy in this life and in the next.
Srimad Bhagavatam 6.2.14,