Working in more than one project? Then you probably have more than one local file on your machine. Each of these local files also has a backup folder and files associated with it. By default, these save in your 'My Documents' folder, but so does everything else you work on. It is easy to keep all these organized together and out of the clutter of the rest of 'Your Documents'. Make a new folder within 'My Documents' called 'Local Files'. Then change the path within Revit to save to this location by default. Go to File --> Options, then click on the 'File Locations' tab, then under 'Default Path for user files', browse to the folder you just created. Now whenever you make a new local file, it will save here along with all backup versions keeping your regular 'My Documents' folder free of clutter!