[JanisL]

If a document is super important we make sure that it's only worked on in a system that support some form of version control. But that's fairly easy for us because we pretty much all are comfortable with Git. In the cases where people simply won't learn Git I find going with some sort of web-based version controlled documents is a massive win.

Whatever you do avoid situations where people email around attached documents with various changes, set strong expectations that emails like that are not to be used. Most of the troubles I've encountered have been because of the inevitable merge conflicts and associated hassles from divergent documents that occur with email attachments.