Your Focus needs Focus.

Desikachar explains in The Heart of Yoga that, that while there are many possible ways of understanding the meaning of the word yoga, that one way is "to tie the strands of the mind together":

​"Yoga means acting in such a way that all of our attention is directed toward the activity in which we are currently engaged. Suppose for example that while I am writing, one part of my mind is thinking about what I want to say while another part is thinking about something entirely different. The more I am focused on my writing, the greater my attentiveness to my action in this moment. 

The exact opposite might also occur: I might begin writing with great attention, but as I continue to write my attention begins to waiver. I might begin to think about the plans I have for the day tomorrow or what is cooking for dinner. It then appears AS IF I'm acting with attentiveness, but really I'm paying little attention to the task at hand. I'm functioning but I am not present."

Eckhart Tolle describes this idea of focusing your attention as so much more than just focusing your focus... he calls it a revolutionary transformation - to be able to perceive the world without the accumulated baggage of the mind. You are FREE of the entire sum-total of your mental conditioning and the heavy idea of "ME." 

"It's so simple to become free of the limited, little conditioned person… it's very limiting and it's so simple to go beyond it, to no longer seek fulfillment through the conditioning. To go beyond waiting for the world to tell you that you are important, that you are somebody. It starts with getting out of your mind and thoughts and hold attention in the body. Start with your hands. Feel the energy in your hands. Hold your attention there and while doing this, look around and perceive - you will notice the pureness of your perception when the conditioned is no longer operating." This is how you enter the state of presence. Right now you can be free - at this very moment.