What's the proper way of reciting the OM BENDZA GURU mantra.
Is there a visualization running in parallel with the recitation?
Usually you visualize Guru Rinpoche in front of you (and slightly higher) or he can be above your head. At the end, you can receive the four empowerments, as described below. Visualization isn't necessary if you are just doing the mantra, but it can enhance the practice.
Here's the visualization taken from http://www.lotsawahouse.org/khyentsewan ... ation.html
4. The Main Visualization
Before us in the sky, in a shimmering sphere of light, white and blue, yellow, red and green,
Floats a throne held aloft by lions, with cushions of lotus, sun and moon.
There you preside, the actual presence of all the buddhas of the three kayas,
Root master, in the form of the Lotus-born Guru.
Your complexion is white, tinged with red, your expression slightly wrathful,
Wearing the lotus hat, gown, and Dharma robes, with
A magnificent dark red cape of shining brocade.
Your right hand holds a five-pointed vajra;
Your left a skull-cup containing the vase of long-life.
A khatvanga cradled in your left arm,
You are seated in the vajra posture.
From the mandalas of your wisdom body, speech and mind
Appear infinite gurus, devas, dakinis and dharmapalas;
All send out and gather back brilliant, dazzling light,
And all become actually present, here.
Visualizing this, recite ‘The Prayer in Seven Chapters’ and ‘The Prayer to Guru Rinpoche that Spontaneously Fulfils All Wishes’, ‘The Seven Line Prayer’, and ‘The Prayer which Removes All Obstacles from the Path’, along with prayers taken from the earlier and later terma treasures, and prayers of any kind that carry the blessing of the vajra speech of the saints of the past. Recite them with an intense longing and yearning, and an all-consuming devotion.
If you can not manage this much, then it will be all right simply to recite ‘The Prayer to the Three Kaya Guru’ and ‘The Prayer to Guru Rinpoche that Spontaneously Fulfils All Wishes’. Whatever you do, at the end call out to Guru Rinpoche and invoke his wisdom mind by chanting the Vajra Guru mantra as much as possible.
5. Empowerment and Dissolution
From the three syllables OM AH HUNG at the three centres of the master,
Rays of light burst out, one after another, and then all together.
Streaming into our three centres, where they dissolve,
Granting us the four empowerments, purifying our four obscurations, and
Making us a suitable vessel to practise the four paths.
Finally, the master dissolves into us, merging inseparably,
And in that state,
We gaze into our original face: the dharmakaya, beyond the ordinary mind.