I couldn't remember if I had posted this shifting article to the board or not, and thought it might be helpful for the M6 guys. Be forewarned though, I wrote it back when I was driving a Mustang! It applies to any car with a manual transmission though.
http://dodds.cc/chad/garage/drag_strip/powershift.htm

There's also a write up on my site about what to expect when you go to the drag strip for the first time, you can find that one here:
http://dodds.cc/chad/garage/drag_strip/Default.htm

And one last article about the tree:
http://dodds.cc/chad/garage/drag_strip/the_tree.htm

Disregard, these are just keywords for the board's search engine: shift shifting power clutch pedal trans transmission flat flatshift flatshifting manual quick fast speed speedshift speedshifting lift lifting technique driving flare flaring gear throttle gas sidestep side step sidestepping dump drag strip racing race tree

 

Nice write up!