Got a denial letter for unemployment, what now? - what worked for you?

I got a denial letter last week saying I left my job voluntarily, but I was let go as a nurse's aide. I would rather hear the honest version than the polite one. The letter lists a deadline and a hearing process, but it is hard to follow. Did you bring documents or only talk?

Keep everything in writing and save the confirmation numbers. It made the follow-up calls so much easier.