Hello Back2Nursing 09, I hope you do well on the NLN and get into PBI for 2010. (If you do, we'll probably take nursing courses together since I am in the three year program.)
A great way to raise your score overall is the Pre-RN Entrance Examination study guide. It's helpful in all three sections and there many practice questions and examinations in the book.
A great and fun way to raise the verbal score by improving vocabulary is to go to freerice.com. It's website powered by the UN that donates rice each time you answer a question correctly and it's super simple to use. There are many subjects to choose (basic math, chemistry symbols, language) but you will want to do vocabulary and grammar. It's great because if you get a question wrong, the program will ask the question again eventually to help you learn it.
For studying extensively into biology and the labs, a great study tool is the Barron's Biology regents book. Be sure it's the large blue version as that is the one that covers all topics. For chemistry, I used Prentice Hall Regents Chemistry review book but they do not sell as it is used for high school students studying for NY state regents. My best bet would be studying from Chemistry for Dummies or going over the review in the RN-PreEntrance exam study guide.
For math, it's pretty simple. But if you are not good in math, the RN-PreEntrance exam study will be the best way.
These are the things I used to study for the NLN. My verbal score was 99%, my math was 99%, and my science was 96%. I had overall 99% percentile and a 152 composite. I hope this helped.