I started my preparation for the PMP exam in early November 2013. Took a 5 day class but I would say taking a class is not necessary. I just took it as my company pays for it, even though my application was approved without this class in Feb 2013 just based on my education/experience. Here is a summary of what I did (you are the best judge of where you stand and what you need to do, so please don't over-study):