For other people who prefer watching lectures: I watched a lot of AK Lectures on Youtube to supplement biochemistry. I haven't watched his O Chem lectures, but his biochem ones are fantastic.I'm in the same boat of needing to prepare for Orgo 2. I took Orgo 1 a few semesters ago and need to brush up on the topics.
I'm doing both - reviewing Orgo 1 material and previewing topics in Orgo 2. Previewing topics helped me get an A in Orgo 1 so I am hoping it will help for Orgo 2 as well.
I prefer watching lectures over going over books, so I'm utilizing a YT lecture series (that lectures on the same book we'll be using in class) I found. I take notes and review them daily. These lectures are 1.5 - 2 hours long, but I feel that they provide me with details that I may miss just skimming through a textbook.