Tom Brass, Certified LabVIEW Architect at Saint Bernard Engineering recently created a video documenting his strategy for passing the Certified LabVIEW Developer Exam and posted it on YouTube. As you may remember, Tom completed the 4 hour CLD test in just over 2.5 hours when he took it. The video should give you a good idea of how he attacked the test, and may help you to pass the test more easily.
http://www.youtube.com/watch?v=zHGJ5-_xDRU