You might as well change the parking brake shoes while it is all apart.
Take the half shaft off and grease both CVs well.
Now is the perfect time to replace the rear wheel bearings. You have full access to them now. I think I paid about $50 for both my rear bearings on here. The hub comes off real easy with the slide hammer. If you don't have one you can rent it from Auto Zone.
Changing the transmission fluid now might be a good idea. I did mine while it was all apart. Everything was very accessible.
That's about it. Depends on your budget, time, and you true intentions with the car. Grease for the CVs is about $10, rear wheel bearings were about $50, not sure on the parking brake shoes, and the transmission fluid was about $25 (I used Mobil 1).
Brake pads are not a bad idea if you need them. You will also have to bleed the brake lines as they were opened. I did not flush my brake fluid, I just bled them. They bled real quick. Now would be a real good time to flush you brake fluid as you will have two of the calipers open already.
Clarks's has the full write up for all these things. Read them for an exact set of details for the job.