Group vs individual studying. Choose what is most convenient for you but be aware that you will need to study individually too

Prepare extensively. Most of it is discipline, following a plan (sounds familiar?), and getting used to how the questions are asked

Start by reading the PMBOK®. This is a must

Reading the PMBOK® is essential. Don’t believe other people when they say you don’t need it. Stay away from information telling you that you only need to read this page and that page. If you don’t know all the PMI concepts defined in the PMBOK® you will not pass the exam, I can almost guarantee it. And, I recommend reading it twice: the second time will help you understand and fill any gaps after you know all the concepts as a result of reading it the first time

If you use flashcards take them everywhere with you and pull them out to practice every time you have an opportunity (i.e.: while on the bus or train, while at your parents’, during your lunch break at work, while stuck in traffic, etc.)

If you use an exam simulation software make sure you take the final exam offered as many times as you need to so that you get familiar with the type of questions and are able to identify where your gaps are and improve your score every time you take it

Practice on reading the answers first, then the question, you will be surprised at how much time you can save

Practice on eliminating the obviously incorrect answer first

Memorize all formulas with special emphasis in earned value and PERT. Create a spreadsheet with the name of each formula, the formula itself, what each element on the formula means and a description of what the formula tries to resolve; carry it with you at all times so you can practice anywhere