Hi Eddy,
I think that there is a very subtle difference between 'concentration' which implies use of the Mind, and Conscious Awareness, which is generally referring towards a sense of 'being' in the moment but with as little interference from the Mind and our Thoughts as possible.
My own personal experience is that the use of anything which involves concentration and the mind, including Mantras, hinders the whole meditative process because I find it very hard to let go once my mind has fixed on something. I prefer to just sit, settle myself and become centred as much as possible (ideally a state of calm inner balance), and direct my focus to my own energy field, my own awareness. The thoughts still creep in, but as soon as I am aware that I am thinking about something, I relax again and 'let go' of them. I find that this way, I will go much deeper into my meditation, and feel a much deeper sense of peacefulness very quickly.
I am sure that everyone will have their own particular favorite method of meditating, but in essence I believe that it is what we 'are' beyond our thoughts and mind which is the state one is really aiming to experience with what Giles has called 'unfocussed' meditation.
Chris
