How does one effectively study for a board exam?

I recently got my temporary license as I wanted to receive a testing window as soon as possible for the CPNRE. I've been using "Mosby's Comprehensive Review for the Canadian PN Exam" as a study guide, and I've just been writing notes as I go through the book.

I don't expect to remember ~2 000 pages of information, but the problem is I don't feel like any information is really sticking to my head. I tend to listen to music (R&B/Pop/Hip-Hop, if the genre matters) while I study, and also take breaks after about 2 hours of studying. Overall, I'd say I spend at least 5-6 hours everyday studying and taking notes. I would greatly appreciate any tips and strategies to make my study time more effective :) Thanks in advance!