I have recorded my Lucid dreams and found that I usually wake up on my back. aslo for dream recall they say it is best to try not to open your eyes when you wake up and because of the chemical make up and the shifhting of the chemicals in the brain, you can have better dream recall if you slowly move to each position in your bed as you try to recall your dreams.

Here is more from a topic I started - Where DO You lie On This Topic:

http://www.dreamviews.com/forum/viewtopic....1376&highlight=