Karmīs change their professions at any moment, but a Kṛṣṇa conscious person does not change his profession, for his only profession is to attract the attention of Kṛṣṇa by chanting the Hare Kṛṣṇa mantra and living a very simple life, without following daily changes of fashion. In our Kṛṣṇa consciousness movement, fashionable persons are taught to adopt one fashion—the dress of a Vaiṣṇava with a shaved head and tilaka. They are taught to be always clean in mind, dress and eating in order to be fixed in Kṛṣṇa consciousness. What is the use of changing one's dress, sometimes wearing long hair and a long beard and sometimes dressing otherwise? This is not good. One should not waste his time in such frivolous activities. One should always be fixed in Kṛṣṇa consciousness and take the cure of devotional service with firm determination.
(Srimad Bhagavatam-----6:5:14-----purport).

According to the Vedic regulative principles, one has to be celibate before entering a holy place of pilgrimage. Generally people are very much addicted to sense gratification, and unless they have sex at night, they cannot sleep. The regulative principles therefore enjoin that before a common man goes to a holy place of pilgrimage, he should observe complete celibacy. As soon as one enters a holy place, he must observe fasting for the day, and after shaving his head clean, he must take a bath in a river or ocean near the holy place. These methods are adopted to neutralize the effects of sinful activities. Visiting a holy place of pilgrimage means neutralizing the reactions of a sinful life. Those who go to holy places of pilgrimage actually unload the reactions of their sinful lives, and consequently holy places are overloaded with sinful activities left there by visitors.
(Sri Caitanya Caritamrta------1:11:112-----purport).

The conclusion is that in order to get freed from the material disease, one must take to the chanting of the Hare Kṛṣṇa mantra. The Kṛṣṇa consciousness movement is especially meant for creating an atmosphere in which people can take to the chanting of the Hare Kṛṣṇa mantra. One must begin with faith, and when this faith is increased by chanting, a person can become a member of the Society. We are sending saṅkīrtana parties all over the world, and they are experiencing that even in the remotest part of the world, where there is no knowledge of Kṛṣṇa, the Hare Kṛṣṇa mahā-mantra attracts thousands of men to our camp. In some areas, people begin to imitate the devotees by shaving their heads and chanting the Hare Kṛṣṇa mahā-mantra, only a few days after hearing the mantra. This may be imitative, but imitation of a good thing is desired. Some imitators gradually become interested in being initiated by the spiritual master and offer themselves for initiation.
(Nectar of Instruction).