Well, we employ project management processes in every project.  Simply this is to increase the quality of our work, have a more predictable outcome for our project.  More complex is your project, the more attention you need to pay to these processes. 

If you believe that the passing the PMP exam can be treated as a project, then you can only increase your chance of passing this exam by following project management processes.  You can read the full details about this approach on the paper listed below.

A Project Managment Approach to Passing The PMP Exam, By Marcos Cubric & Payam Moghtader 

Working in the classroom environment, students always ask me about references and resources that can be reliable and used outside of the training environment.  On the page linked below I have tried to keep a relatively a current list of references documents that I find most useful to the students and the enthusiasts.  Hope you find this page useful.

2Dev Links & Resources Page