I've been really stalled out lately. I think I need to develop some new routines that will help me motivate and keep producing chapters.
Today I skimmed through the methods and materials chapters of 4 recent dissertations from my department. They were in the 16-24 page range. One diss didn't have a methods chapter per se.
The basic gist is to name the methods and cite some references; justify the methods chosen in terms of your research questions; describe the actual work you did and how you did it; and address any challenges you faced.
I am thinking of working on this chapter next because it's yeoman's writing, nothing fancy, and it would be good to cross another chapter off the list.