"This chanting Hare Krishna maha-mantra you chant and hear. Anywhere you can do it. You sit down in your home or in your office, in your factory, underneath a tree, or anywhere you can chant:
Hare Krishna, Hare Krishna, Krishna Krishna, Hare Hare
Hare Rama, Hare Rama, Rama Rama, Hare Hare
And you can hear. This process will make you advanced in everything. Caitanya Mahaprabhu has given His benediction, iha haite sarva siddhi hoibe tomara. By, simply, by this chanting and hearing of Hare Krishna mantra, all perfection you'll get. It's very easy."
(Srila Prabhupada lecture, 10/9/76)