Cardiac Vascular Certification ANCC Recommendations

I have been looking into taking the Cardiac Vascular Certification exam through ANCC, and have been working on Cardiothoracic PCU floor x7 years. I don't have much time to study, and have briefly skimmed diagnosis, etc. Pretty much the most common diagnosis (besides Buerger's and other random dx) I have dealt with at some point. I don't really have time to study with working full time and family/home renovations. I am worried about taking a test since I haven't done this in years. It is one of my goals that needs to be accomplished this year! Any tips on studying, how to answer questions, test taking strategies, advice from others would be greatly appreciated!