Here is a short guide for organising a large LaTeX project.

Here is a starting kit for such a project, implementing the ideas from the guide. Arguably, the .sty file in the kit should be a .cls file, since it contains settings for the document class memoir. The idea is that users who want to use a different document class need only remove those lines.

For a version of the starting kit that is customised for doctoral theses at the University of Oslo, see phduio.