Yeah, about turning on your side or changing position. Does that have a big effect on how well your efforts will pay off. For me Im able to concentrate and keep aware best while lying on my back but sometimes it does get so uncomfortable that I just have to turn over. But Ive also had some success with lying on my stomach as well so...Im not really sure if any position is better.

You can fall asleep sitting right? I have a very comfortable chair that Ive tried to self hypnosistize myself in and Ive gotten to where I kinda lose awareness of my body but have never actually fallen asleep sitting.