Edge Motorworks has some good info about this on their e36 checklist.
Edit: I can't get the right link up, just click and go to 'checklists' at the top of the page.
I just changed my rear shock mounts to the ones from Rogue Engineering. (About $100) It's cheap insurance as far as I'm concerned as if they get really bad, your shock can tear through your trunk. They're really easy to replace, too.
Ground Control also sells some nice replacements, and I think you can also use Z3 ones.