I'm studying for the DAT as well and from what I know we should commit to memory all of the major reactions . Keep a list of them, especially the brand name reactions, and just keep writing them out until you have it down cold. The act of writing them over and over seems to be working for me. My only problem in this section is the spectroscopy stuff, and keeping straight NMR vs IR, whether we should memorize frequencies, etc. Anyone have any advice on this?😕