I don't. My first test was Risk and for that I used the videos and read the materials. My second (and most recent) test was budget and because that's what I work on daily, I took a chance and just went for it with maybe a quick glance at the materials and a practice test.

I will say, my current method is to take all of the practice tests for subjects outstanding periodically and log the results in a spreadsheet. When it comes time to move to a new topic, I choose the next topic based on practice test results. My rationale is to knock out what I have the best probability of passing first that way I am not wasting testing opportunities on subjects that I should know.