>>/7659/
You started a thread for something that you don't want to learn. You said this after you got replies relevant for the thread topic.
What I said:
 >>/7635/
>  looked more into the terms and it seems Dharana requires ethical lifestyle, practice of postures and the ability to withdraw from the external.
> Dhyana is a result of practicing Dharana for a longer period.
> Have you done the other forms of yoga first?

Your reply:
 >>/7637/
> I'm just using the terms "Dharana" and "Dhyana" because they are more well known terms for the eastern name of the practice of these specific mental exercises, but I am not a Buddhist and nor am I engaging in a Buddhist practice.
The specific "mental exercise" of dharana is what this 450 page book explains how to achieve. I found it very useful and wanted to share this finding with you because you served as a messenger here unintentionally, setting my focus on the topic. 

> I am not a Buddhist and nor am I engaging in a Buddhist practice.
Neither am I, these practices are Hindu related if anything.

The Hatha Yoga Pradipika which I've used because it's considered a foundational book in Hatha yoga, explains Dharana without naming it. I also said I have practiced it for the duration of time I have practiced Hatha yoga:
 >>/7646/
> I have used that exercise since around 1 - 2 years as part of my daily yoga routine
In Hatha yoga is not included to use a timer to measure how long you sit in meditation. It defeats the purpose to have this competitive mentality. I usually do this particular exercise of focusing on a point before me for 10 - 30 min at a time, which is an estimate given what the clock showed before and after the session, with the estimated time for physical exercise detracted. At this stage it's still an external practice; which I also referred to is mentioned in the book posted here:
 >>/7644/
This means whether you lose focus is a matter of if your gaze moves from the point you are looking at. What you are thinking of isn't at this stage important. In the Pradipika it's not detailed that the next step is a specific internal version of this same practice, as far as I remember. But it's a short book, 36 pages, so maybe the author just ran through that part in a few lines.

Now even after being told this several times

you still repeat (like a mantra) that you want to instantly skip to the last, most difficult process at once, that which a yogi wrote 450 pages of instructions for. And you want to do this without practicing any of the processes detailed for reaching there.