One important recommendation I have for those taking the PMP Exam is that to manage the time allotted to answer each question on the exam. Call it budgeting, call it time management, call it whatever you want; but do it! You need to walk into the examination room with a clear plan on how many questions you will answer per hour, when you plan on taking a break, and what you will do if time seems to be running out.
Remember that the exam is composed of 200 questions that you must answer within 4 hours. That's 1.2 minutes per question. Once you begin, the clock starts and will not stop even when you take a break. So plan your approach - say for the first 2 hours, answer all easy questions first and mark those difficult ones for later. Be sure to read all the questions carefully and understand them before you answer. Then take a 10 minute break before going back to the harder questions for the rest of the allotted time. By doing this you will be able to finish the whole exam on time.
But that's just one of many possible approaches and you should define your own. And by having a plan and implementing it you will relieve a lot of the exam pressure. So plan well, and budget your time wisely to succeed.