I stretch with the foreskin covering the head. You wont just be stretching the skin either. Sure at first it will be mosly skin that you're stretching, but once your skin has been stretched out all you have left to stretch is the penis.
I used to hang while listening to trance. It made time fly by oh so fast. I enjoyed those times, now I don't have enough time to hang too much, but I do flick on the radio when jelqing and stretching.
That break has served me well. I've gained at an impressive rate these past two months. I'll tell ya what I've been doing when the two months are officially over, so that I can accurately measure my gains.