It kind of depends on your work area and what you are doing. You won't permanently twist the car lifting a corner unless the car is suspect to begin with. You need to get the tire off the ground and ALWAYS put the stand in before you pull the wheel, BUT loosen the lugnuts a half turn or so before you jack it up unless you have an impact.

I like to jack up A-bodies from the center of the k-member in the front or under the differential in the rear. You can jack up a corner from the sub-frame, BUT make sure you are using the sub-frame and not the rocker panel or something else.