How to Prepare for Cisco CCNP R&S

Great! Thanks for the feedback, seems quite useful. I got my CCNA r&s last June, with a little internship work experience, prospects in Greece for finding a job ranges from difficult to extremely difficult.
Anyways, I 've already started studying for CCNP r&s and I was wondering whether I should go straight for it, or pick a specific certification. My inclination lies more upon on SP, but as far as I can see, VoIP, Security and Wireless are very popular (I was thinking on taking a bite of VoIP/Video)
What would you advise on that?

oh, btw, your GNS3 labs seem like HUGE help, thanks for sharing them with the world!