Hi Stevie,
Maybe this will help :
What I do while meditating, as I am sitting is to focus on my sitting position. I sit cross-legged or on a chair with a comfortable cushion under my buttocks and my feet flat on the gorund. I'll let my body relax and feel where it feels uncomfortable, then relax those places that are tense, or straighten the places that feel compressed. Inevitably, I end up after some time in the classical uprright position that you see traditional meditators in : the spine is straignt but relaxed, without any support, the armptits are slightly opened and the hands are resting on the knees or joined on one's lap, facing the sky. the throat and chest are totally relaxed and comfortable. My breathing gets calmer and calmer all by itself without any particular attention being given to it.
By focusing on my sitting position, I get those 2 benefits : 1) it furthers the minds relaxation and silencing, and 2) my body definitely feels better and "full" for the rest of the day. I used to have back problems, but simply by focusing on sitting correctly while doing Holosync, I have eliminated all the pain, and greatly improved my posture.
It can help to do a few sessions with a postural therapis or Chi-Gung teachers, in order to get a feeling of what correct body alignments are.
Or you can check out the following book by BK Frantzis : Relaxing into you being ( http://www.amazon.com/exec/obidos/ASIN/0963180800/104-2844400-7077521 ). It gives very good instructions on proper body alignmetns for sitting meditation (whatever your school of thought, although I don't think he ever heard of Holosync !)
Cheers,
Erwan