One thing I like to do when stretching is to push back on the base skin-like in the DLD [words=http://www.mattersofsize.com/mosdvd.htm]DVD[/words]- and perform a kind of clamping action on the base, which is where I commence my stretching action once I've hit about 70-80% erection.
With my hands right close together like that I can use my thumbs/fingers as fulcrums and I stretch in as close to a full 360 degrees as I can.
Then I shake, squeeze, kegel more blood into the penis and slide my non-base-squeezing hand about an inch toward the head and repeat the stretching process.
Using the engorged portion of my penis as an "anchor" allows me to get a damn good stretch as well as producing a prolonged jelq effect.
By swithching hands as I work my way from base to head and keeping the directions constantly changing, I feel the stretching action all the way down the entire length of my penis. By the end of a workout my dick's one whupped puppy.