Last fall 08', I took and passed the PMP exam for the Project Management Institute. When I attend PMI meetings, I make the following recommendation to folks about to sit for the exam:
1) Buy Rita's Exam prep book and Questions and Answer software - http://www.rmcproject.com/
2) Read the PMBOK 3 times
3) Read Rita's book 3 times
4) Shoot for answering 1000 Rita questions
5) Attain 85% pass rate with Rita questions
Good luck on taking the test!