I am a big proponent of doing backups. My WIP files are in 3 places.
– WIP folder on my desktop
– to cloud (DreamCloud w/ DreamHost)
– USB key here at my desk
LibreOffice is set to do an autosave every X minutes as well as save the document as a .bak file whenever a save is done.
The cloud version backed up weekly.
The USB key is mirrored every morning.