Training slides have quite a bit of material to cover for the standards making is harder to distinguish between noise and what is really important.
The best way to make sure that you are retaining the information from each of the domains, is to take notes. While you are not allowed to use your notes, taking notes is a good way to retain information and makes the review process much easier. Many different tools can help you take notes by domain. i.e. the training application has an embedded tool to take notes for each slide.
In the previous blog I mentioned to give yourself some buffer between finishing studying and the exam day, reviewing your notes during those 7 days is a good idea.