"From whatever and wherever the mind wanders due to its flickering and unsteady nature, one must certainly withdraw it and bring it back under the control of the Self." (Bg. 6.26) This is the real yogic process. If you are trying to concentrate your mind on Krsna and the mind is diverted−wandering to some cinema or wherever−you should withdraw the mind, thinking, "Not there, please. Here." This is yoga: not allowing the mind to wander from Krsna.
Very intense training is required to keep the mind fixed on Krsna while sitting in one place. That is very hard work indeed. If one is not so practiced and tries to imitate this process, he will surely be confused. Instead, we always have to engage ourselves in Krsna consciousness, dovetailing everything we do to Krsna. Our usual activities should be so molded that they are rendered for Krsna's sake. In this way the mind will remain fixed on Krsna. As stated before, we should not try to sit down and stare at the tip of our nose. At the present moment, attempts to engage in that type of yoga are artificial. Rather, the recommended method is chanting loudly and hearing Hare Krsna. Then, even if the mind is
diverted, it will be forced to concentrate on the sound vibration "Krsna." It isn't necessary to withdraw the mind from everything; it will automatically be withdrawn, because it will be concentrated on the sound vibration. If we hear an automobile pass, our attention is automatically diverted. Similarly, if we constantly chant Hare Krsna, our mind will automatically be fixed on Krsna, although we are accustomed to think of so many other things.
¯The Path of Perfection