knowing the car backwards
Seriously though, I do the front first, then the rear of the car, working on a corner at one time.... i reckon if I was in a rush i could get the car pretty clean, and regreesed in 2 hours or so...
Just keep everything in order, and all tools too hand, makes life easier. I also tend to do it in a modular nature, so remove all the parts for one side then the other.
Then again I'm not slow in working anyway... I've managed to have the car changed from the std suspension to the lwt, and setup in 45mins before.
(mainly cause I make sure both sets are always ready to be used when at the track, so i'm not greasing and lubing up parts when putting them on)
Scho will back me up on my wrenching speed