"High-yield" means an investment with a high rate of return.
I think that one thing many students neglect is organic chemistry. Some think it is okay to learn just the basics and not focus on the more complex content too much because orgo is "only 25% of the BS content."
However, when 1 question can either increase or decrease your score, it would behoove everyone to know orgo inside and out. 25% of 52 is 13 questions, some of which will certainly be the more difficult/complex orgo concepts. Yet, you can't say that about a single concept in physics, general chemistry, or biology. Meaning, there is no guarantee for a particular type of content in any of these sections. You can't count on circuits, redox, or immunology being on any particular exam, but you can be sure that orgo will be tested in each one.
Now, I understand quite well that orgo is not a "topic," but I think it is an entire category that many people severely neglect.
If you were 2 weeks away from your exam and you had several things that you needed to review and master, I would pick orgo rather than a particular set of physics topics, for example. Why? You could spend a week mastering circuits, redox, and immunology and then have NONE of those topics on your exam. However, if you spent that week mastering orgo, you will do that much better on those 13 or so questions that will definitely be on the exam.
I just wanted to share since I always hear people freaking out about their week topics in a particular subject and then regarding orgo as low yield. Personally, I thoroughly reviewed TBR orgo with a focus on the second book (went through 3 times).
Best of luck to all studying!
Best,
C