I was doing research for my chapter, and I came across this wonderful talk by Bruce R. McConkie. He gives and explains ten ways to understand the Isaiah chapters.
It really helps! Take a look. Some of them are time-consuming (so I haven't tried them yet), but some are not. It is really worth a read. We have quite a bit of Isaiah to go through yet, and I'm hoping it will be more of a walk-through feeling than a slog-through feeling!
Ten Keys to Understanding Isaiah