This is my study method, and I've got a semester and a half of NS As under my belt:
1. Read the material before class. I highlight as I go. If I fail to read all of if before one class, I make myself finish that afternoon. I really try not to get behind.
2. Print out powerpoints/outline if available, and take good notes either on this or in my notebook as appropriate. I take my in-class notes by hand, because this forces me to type them up later, and I get more review in.
3. I record every lecture, and usually play them back when I type up my notes. Our classes are team taught, and a couple of professors I only usually need to listen to once, but I still record them in case I get to a spot in my notes that isn't clear. I type all my class notes in kind of an outline form, since I actually hate powerpoints and don't like to study from them. Depending on the class, the professor, and the topic, I might supplement with additional info/clarification from the textbook, especially if that part of the lecture wasn't clear to me. I try to do this not the same day as the lecture, but within a few days so the material is still fresh.
4. In some classes, we've been given some type of topical outline, study guide, review questions, or objectives that should be "areas of focus" on our exam. I pull relevant info to answer all of these, and retype it all again. At this point, I really know the material - I learn through all these steps involved in creating my "study guide," not from studying it.
5. Whatever time I have left before the exam, I spend doing NCLEX questions, review questions from the chapter, questions from the study guide that accompanies the textbook, questions from the textbook website, etc. I'm allowed to look up answers that I don't know, since I usually remember whatever I've looked up if it shows again on an exam.
I also listen to the instructor. It's part of why I record lectures. Some of them will actually tell you what or how to study, and I follow their advice. Others seem to emphasize certain topics, maybe just with the tone of their voice, that tend to show up on the exam. You might be able to learn what to listen for.
Try to understand the whys of what you're learning. That's what NCLEX-style questions test, is reasoning and application with the assumption that you know the basic material. You also really need to find out what works for YOU. Some people in my class swear by notecards, and claim to do well, but I quit making them after my first NS test - they weren't useful to me like they were in A&P - except in pharm, where I went back and made drug cards when I realized that those do come in handy.
Hope some of that was helpful! It's what I do, and while time-consuming, it works well for me.