just take a deep breath and dont rush!!!

I took it and didnt do well on it but i my nclex was nothing like the hesi test it was more like the ATI exam. the best study advice i can give is if you have an nclex review book with a cd rom use that and take plenty of practice tests and quizzes

Obtain study materials if you don't already have them, make yourself a study schedule, and then put in an honest effort.  You will have to do the same thing for the NCLEX, so this will be a good introduction to the process.  Good luck.