How do I become an official member of the press?

I run a movie website or "blog" as some may classify it, how would I go about becoming an official member of the press in order to receive review copies of DVDs, press passes to events, etc.? I have already received some review material just by e-mailing the right people and giving my site statistics. I'm assuming these would be the same steps if I begin writing movie articles for my local newspaper?

I believe that there is a press association that you will have to become a member of. Each country has one. Check your local trade office for their contact details.