The best points for the rear will be the lower control arm points (right behind the door) about 6 inches under the car. Just ahead of the control arm you will see a large flat area (about 6x6) that is perfect for the lift pad.
For the front, under the front subframe is best. This one is a little tougher to find. Its a "U" shaped channel of steel that will come from under the firewall down to about where you're feet go inside. They will be about 6 inches under the car.