First of all, study using your textbook/workbook. Some study sites provide grossly wrong information.
Secondly, while testing remember BSI/SS and your ABC's. After that pay attention to the vital signs given (know the normal ranges).
Also, remember If the question didn't state it, it didn't happen. Try not to over think things.
Finally, study, study, study, get a good night's sleep, and eat breakfast/lunch before testing.
Good Luck! ^_^