This morning I tried a different grip on my Gillette Super Speed, and I was impressed with the way it increased my awareness of what the blade was doing.
I got the idea yesterday when I stumbled across LeisureGuy's DE blog. He mentions shaving with a travel razor with a short handle. Instead of using the handle, he found himself holding the head of the razor.
My Super Speed has a fairly short handle, so this morning I tried gripping the razor with my thumb, index, and middle fingers on the narrow part of the handle, right behind the head. The end of the handle rested in my palm, close to my wrist.
This grip was more secure than the two-or-three fingers grip I'd been using, and it allowed me to feel the whiskers getting cut. The small vibrations don't make it all the way up the handle normally, but closer to the blade I could tell whether the razor was cutting or just sliding along.
I found this helpful, since I'm just in my second week of DE shaves.
So--not claiming any credit here, but I just thought I'd pass the idea along.