You can always start by getting the book and checking it out some. Chances are the first thing you will talk about will be conformational analysis, so it's preobably good to review energy diagrams for things like the rotamers of ethane and higher alkanes. Also, conformations of cyclohexane rings, specifically in terms of the so-called "A values." Beyond that, the thing that will probably help the most is to get comfortable with molecular orbitals and how they behave in different reactions. Most physical organic chem. books will have a section on that for sure, but there are also sections in books like March. Another great reference is the Fleming book, but that is kinda advanced for a beginner.