A good rule of thumb is that if it can crossover into biology, then it is high yield. If it can crossover into general chemistry, then it is medium yield. If it has limited crossover, then it is low yield. This is not a perfect rule, but a pretty good one that BR has a motto in the classroom.
There are certain areas of physics that lend themselves to specific analogs in biochemistry and physiology. Things like blood flow and Poiseuille's Law connect really well. DC current and nerve cells as well as capacitors and electrophoresis are natural pairings. One thing we suggest to our students is to write different topics onto pieces of paper and then draw three randomly. Try to figure a passage based on those three. If you do this enough times, you get into the midst of the writer.