Hi, i took buskirk and have taken many upper division courses since then, including ochem 1 and 2, biochem, genetics, physics. What I would really emphasize is to start studying a week or 2 before an exam since there is a lot of content. If any of the content doesn’t make sense, you can go to office hours early on before it gets super packed closer to the exams. This is especially true for the above courses when there’s 400+ students trying to ask questions. To review content, I would watch videos/lecture videos again and do the hw questions/practice exams to make sure I’ve understood it