Hope I'm able to tell this in English, well here we go:
First thing, you sit on the hand you usually Don't jerk off with.
Wait until you can't feel that hand anymore (like sometimes you fall asleep on your arm and you can't move it for a while after you wake up)
Then wrap that hand around your cock with your "good" hand, hold it like that and jerk off! Feels like somebody else is doing it. That's all, but hurrry , cause it won't last long.
