I identified about 7 reasons why Lorca is set to music a lot. Then I write them down, and started to work on paragraphs for each of these reasons. I wrote a lot that day. The material almost organized itself. All of a sudden I have 2000 words in that chapter instead of 800.
If you can write a good list of things, that is always good. But the thing to do is to make an argument out of that list.