Does anyone have any tips or tricks on taking and passing the Adobe DSP Certification exam?  I have over 15 years of experience in digital advertising and DSP's, and have significantly improved the performance on client campaigns, but this exam has me stumped.  I have gone through all of the learning/training materials at least 3x's.  Additional references tend to focus more on search, which I plan to take once i conquer the DSP one. Any help is greatly appreciated.