I found this out by accident almost and I don't know if it would work for anyone else but here it is. I was already edging and was trying different ways to touch my cock and stimulate it, so I decided to just wrap my hand around it like I was gonna jerk it. I just applied some pressure at a sensitive spot right below the head on the top and bottom sides of my shaft. My thumb was on the top and the rest of my fingers on the bottom. I squeezed and was immediately suprised by just how stimulating it was. I held my hand perfectly still and after about a minute I started to cum and holy crap!! It was THE most intense and mind-blowing feeling I've ever made myself have, except one time during sex. It was so powerful and I don't think I've ever cummed that much. A loud, involuntary moan escaped my mouth. Spurts just kept shooting out and the rush kept going and going. After a while when it was over, I almost couldn't believe what just happened. I tryed to replicate this again, but unfortunately it wasn't as powerful as before but still nice LOL. I would suggest just holding your hand or fingers on the sensitive parts of your cock while your edging or close to climax. The trick is to push hard enough to stimulate, but not too hard to where it hurts (and so you can draw it out somewhat). Good luck = )
~Update~
I have managed to catch this act on video (although the quality isn't great cuz its just a cheap digicam) and if I can figure out how to format it right, I'll definately be posting it!!