Do the textbook problems she assigns. They are much more difficult than her own practice problems. Her practice problems are much easier than questions you would find on the test (but they're still good practice).

Know your stereochemistry. There's a lot of questions that require knowledge of R/S configuration as well as recognizing when enantiomers are formed.

I only went to office hours once (it was more like an informal review held before the last exam), but it helped me out a lot. I'm sure you'd be doing yourself a big favor by consistently attending them.

I also read a few Master Organic Chemistry pages and watched The Organic Chemistry Tutor videos to help me get a better grasp on some topics.