The rear wants to squat and the front wants to lift. If you can minimize how much either/both move in those directions the better. By properly positioning the chassis low in the rear and high in the front to start, movement can be minimized...
Hitch and chassis play a big role. If you look, most of the gasser guys have moved away from the rears jacked up in the air and gone to the "dragging ass" stance.....they've learned something over the years.
Also pay attention to chassis/body angles, I've seen truck bodies mounted on the chassis so that they appear to be running differently than they are (ie. the rear of the truck is 8" off the top of the frame, but the front is 2"). The truck "looks" level, when in fact the chassis is not (although I haven't seen it much in the diesel world yet).
On a stock/street truck, you are kinda limited as to what you can do.