I discovered this by accident a while ago but it makes for a very nice finish to a good jacking session.
I start by getting naked from the waist down, and then enjoying some porn or Solo Touch on the computer. I jack using whatever technique I feel like but I do it dry. (I'm circumcised but they left me a lot of skin I can slide up and down my shaft). When I'm ready to cum, I sit down in my chair, lean back, and point my penis straight up. When I shoot my first squirt, I loosen my grip and let the cum run down my shaft. I then spread it around and start jacking like crazy to finish my orgasm.
This whole event takes maybe 1 second to complete and I have found it makes very pleasurable sensations to switch from dry to wet. Clean-up can be a little messy so make sure you cum prepared.