I'm getting ready to replace the rear brake pads and rotors on a 2000 Grand Cherokee. Any tips/secrets/advice on getting the rotors off?

just remove the calipers with the pads, but you will need a 7mm allen to remove the caliper pins. then just take off the rotors. you might need to hit the back of the rotors a few times with a mallet, as they sometimes get some corrosion. also sometimes there's little clips on the lugs, just use a pliers to remove those.