For most documents I create and work on I name them like this: document.YYYY.MM.DD.docx Then I move older copies to a subfolder called archive. This has saved my bacon more than once. They also sort out quite nicely in windows explorer. I gave up long ago calling them final or rev 1 or rev 2, until actually officially released. I work in an engineering firm, and we do have an official document repository. When it's placed there it really is a certain version. then I can name my working file to correspond to the "publishe" official version.

Mike