Orgo II is similar to the second half of Orgo I. Maybe a bit more emphasis on synthesis depending on the professor. You really need to make sure you understand all the reactions, mechanisms, reagents like the back of your hand. Guessing you probably covered elimination, substitution, addition, reactions with alcohols, ethers, epoxides, alkenes, alkynes in the second half of your semester. Orgo II is just a whole lot more of this. Make sure you understand things like resonance and carbocation rearrangements by resonance, hydrogen and carbon shifts cause most of the time when you're having difficulty figuring out a problem, that's tied into the answer. Also, some schools do NMR in Orgo I and some in Orgo II. If you haven't already done it, you might want to look into it cause it can be a pain in the ass for some people.