Make sure you know what the intermediates look like. It is more important that you can look at the reactants and the reagents or the reactants and the product and be able to tell what set will lead to what. For example: reagents that lead to syn vs. anti additions, oxidation vs. reduction reagents, etc. I haven't taken the DAT yet but I have studied the least for this section and I am getting a 24-25 on my practice exams.