Practice Makes Perfect

The following is Great Master’s answer as to the best way to reach and hold the eye focus:

That method is the same as all saints use, which is simply the concentrated attention held firmly at the given centre. What else can we say? It is all a matter of unwavering attention. Every ray of attention must be centred there and held there. If one strays away for a time, one has lost the advantage. It may be said safely that if any earnest student should hold his attention fully upon the given centre for three hours, without wavering, he must go inside. But that is not so easy without long practice. However, by and by, the mind becomes accustomed to staying in the centre. It rebels less and less, and finally yields to the demand to hold the centre. Then your victory is won….

It is a matter of will to hold to the centre, also not to forget nor allow the attention to go off after some other thought or experiences…. Make the spirit, instead of the mind, the commander of the situation. The mind is tricky and will run out if permitted. Conquer it. But to conquer it is not easy, of course, and it takes time. The problem is not complicated at all. The whole thing is just attention, and then unbroken attention, at the eye centre, allowing no other thought to intrude itself into the consciousness and lead you away from the centre. This was the method by which I won my way inside and it is the method by which you must win your way.
_{Maharaj Sawan Singh, Spiritual Gems}