Your best approach would be to talk to your local PMI chapter. Many run exam prep courses that are structured to carefully cover the full scope of the exam and put your thought processes into the right framework for reading the questions and deciding on the answers.
Before writing the exam you will need 35 contact hours and, not surprisingly, many of the chapter prep courses are 35 hours in length.
Those courses (and the instructors and students) will give you a variety of pointers to good sources. That's where I got my initial leads. Why am I not giving them to you now? Because I wrote the exam about 5 years ago, I don't know if those sources are even available let alone know if they have been updated to reflect the recent exam changes.