Just finished my first semester of organic and did well. I prepped for it over the summer by going over the concepts in the textbook when I had free time at work, laying in bed, etc. I plan on doing the same thing Christmas break, but I'm not sure if going over organic II material or quantitative analysis material would be a better use of time. Organic II seems to be mostly memorizing reactions, but I could go over a few of the concepts, like aromaticity, etc, and I have no idea really what quantitative analysis holds in store for me. I'm looking to teach myself concepts, not straight memorize things - I'll memorize when the time comes around. So what would you all suggest?