Good luck on your review. That's right, only memorize the very basic lab values. If you try to understand the concept first, the analysis of the question becomes easier. Eliminate wrong answers. I read the Saunders and used mostly the free online review of nclex3500, this one is a lot challenging than Saunders.
Get the ExamCram Practice book. It has 1,000 questions and the style is a lot similar to the actual exam. I think it is less than $30. You can focus on this 1-2 weeks before your exam. I cannot say about their CD since I haven't accessed it until now.
Don't clutter your mind with a lot of review materials because it will just confuse you.
What worked for me was, Saunders for the basics, La Charity for prioritization, and 3500/ExamCram for analysis.