Well, maybe I can describe it..I'm getting weird responses from people.
Put the bottom of your left hand (pinky, etc) flat onto a table.
Put the pen between thumb and index finger.
Curl the ringfinger and pinky, putting the pen in front of the top bendy part of ringfinger and onto table.
Put middle finger on top of the pen over the ringfinger (if the pen wasn't there, the middle finger would be on top of the ringfinger).
Put index finger next to middle finger.
Put thumb over index fingernail.
Write.
That's what I do.