You can go to Gateway's library and check out Nclex-pn review books for $0. No need to spend alot of money at this stage. Don't be afraid to start taking practice tests - by going over your answers with the rationales, you'll learn a lot, and begin thinking in an "NCLEX" way - for many students, getting the hang of NCLEX questions is half the battle.
If you want to spend a few bucks on something that may be useful, you can pick up an ipod touch (even a good used one on Craigslist) - there are lots of nursing apps for those, including Nclex practice questions, anatomy & drug practice questions, and several flash card apps that you may find useful. Don't spend alot (used ones should only be $100~ish) - the little 8-gig ipod will hold everything you can think of - including drug books, medical dictionaries, nurse's notes, and thousands of nclex practice questions. It was useful for me, but out of 30 people in my class, maybe half-a-dozen had ipods, so it isn't a requirement.
If you've got Itunes on your PC, there are some pathophisiology 104 lectures from Mesa Community College on Itunes - http://itunes.mc.maricopa.edu/ - Click on "nursing" once Itunes opens up - They're another $0 investment, and you don't have to be a student at MCC to watch them. I enjoyed them alot, and it'll help you get a feel for nursing classes - don't worry if some of it is over your head, it'll begin to make sense as you progress through the program.