I am not worry about the front, as front weight is fix, but rear depend whether with/without load. I start to play with different pressure on rear to feel how my car behave when cornering, I start to push it at a corner which I use to play. Push it to the max till I feel the car is slipping/drifting out. From there I know what pressure on rear that I would like to have.
Too high pressure on rear give you surprise once it skid......you also can reduce/play with the rear damping if your are on after market Coilover. Or adjust the ARB setting on the front & rear to cater your requirement.
Just my 0.02 cents