My own personal take, ensure you fully have the latest CISSP principles firmly embedded in your heart and soul. These foundations are from my perspective, absolutely essential for you to pass this concentration and indeed any concentration. This means ensuring you test your own understanding and go back to basics. Because half way through your revision regime, you don't want to have to go back and revisit the basics, its disruptive, unless you have photographic memory inbuilt (if you are lucky).
If you can afford, it, invest in a virtual ISC2 online course, and go through the intensive course. Each session is recorded and you can play it back for reinforcement purposes. You will also need plenty of experience, as the examination not only reviews your understanding of the underlying principles, but also how they can be applied to real life scenarios. To me personally, it was invaluable.
