After graduating my nursing program, I decided to take a break for 3years, instead of going into the medical field. I am ready to find a job now. Can anyone tell me the best way to review my nursing knowledge before applying for interviews?

I did, they orient you. Find a smaller ICU.

Check around your area for a 'nursing refresher' course being offered. You may have to search outside your local area to find one. For instance, in my city, there is a place called 'The Center for Nursing Excellence.'