The practice test at the end of this book was helpful. I found it in the library; I bet you'd be able to as well.
As /u/justblaze5687 stated, you'll pass if you did well in your emt course. If you walk out of the NREMT feeling like you failed, don't sweat it- the better you do, the harder the questions will be. Good luck!
Congrats man! I don't start my EMT class until February but I'm pumped. I can't wait to hopefully get a full time job and then work towards my medic license in a year! And don't sweat the computerized test. It wasn't too bad. I like how it can be short if you answer the questions right and the computer feels 95% sure that you are competent enough in the subject. There is this book on amazon that helps you study for it. http://smile.amazon.com/gp/product/0738611301/ref=ox_sc_act_title_2?ie=UTF8&psc=1&smid=ATVPDKIKX0DER