You should be familiar with the most commonly seen mechanisms, their starting and finishing points, e.g., SN1/SN2/E1/E2, ether synth, Wittig, Clemmenson, aldol, etc. Knowing those mechanisms well will allow you to determine which starting reactants would be necessary to arrive to a particular product. I didn't see any individual step questions. DAT Destroyer really helped with the orgo section of the test.
