I would also recommend taking a complete Kaplan review course, preferably the one where you go to review classes for a week and also have the question bank online. If you practice ALL the questions they give, and make sure you understand the rationales given, you should do fine on the NCLEX. Kaplan also provides audio and video reviews of nursing content, just in case you need to brush up on that. The Kaplan review course gave me all the preparation I needed. When I took the actually NCLEX, I still felt that I was doing educated guessing, but I ended up passing with 75 questions. Kaplan really helps you to learn how to answer questions critically, even when you may not have come across the situation/question before.
Hope that helps!