Before you can start to develop a set of related documents, you must first come up with a standard naming convention. This is especially important for very large documents with multiple images and associations. With multiple people working on the conversion process, it is important that the naming be consistent.
You should also decide on a directory structure. I've found it best to crate one directory for the HTML pages, a sub directory for related images or attachments, and a third directory for icons (if any). The Directory names have their first letter in Caps (in Unix). All file names I try to keep to 8 letters for portability and simplicity.