Those who have taken to Krishna consciousness should be very careful that not a single moment is wasted and that not a single moment is spent without chanting and remembering the Supreme Personality of Godhead and His activities. By His own actions and by the actions of His devotees, Krishna teaches us how to become cautious in devotional service. Through the medium of Bharata Maharaja, Krishna teaches us that we must be careful in the discharge of devotional service. If we want to keep our minds completely fixed without deviation, we must engage them in devotional service full time. As far as the members of the International Society for Krishna Consciousness are concerned, they have sacrificed everything to push on this Krishna consciousness movement. Yet they must take a lesson from the life of Bharata Maharaja to be very cautious and to see that not a single moment is wasted in frivolous talk, sleep or voracious eating.
Eating is not prohibited, but if we eat voraciously we shall certainly sleep more than required. Sense gratification ensues, and we may be degraded to a lower life form. In that way, our spiritual progress may be checked at least for the time being. The best course is to take the advice of Srila Rupa Gosvami: avyartha-kalatvam. We should see that every moment of our lives is utilized for the rendering of devotional service and nothing else. This is the secure position for one wanting to return home, back to Godhead.
Source: A.C. Bhaktivedanta Swami Prabhupada (2014 edition), “Srimad Bhagavatam”, Fifth Canto, Chapter 08 – Text 29