GNP Cert Exam Advice

Dear Friends:

I have just completed a training program as a Geronotological Nurse Practitioner. I am preparing to take my certification exam. For those GNP's out there, or GNP students at a similar point in their careers, any advice? How should I study for the certification exam? How much are the aging theories/sociological aspects of gerontology emphasized vs. clinical aspects. How do you suggest I prepare for the clinical questions?

Thanks!
KATGNP