Since other people may make changes to the live site as you are also making changes to the .muse file, it is recommended that you save copies of the site after you sync the changes and publish the newest version.
Immediately after publishing the site, choose File > Save Site As and save a copy of your .muse file. If desired, you can include the current date in the file name when you create new copies. This practice makes it easy to locate the .muse file that you published on a specific date.
For example, you can create a folder that contains your newest working copy of the .muse file and several other archived versions that contain previously published iterations of the site design. The list of files in the folder might look like this:
In addition to making it easier to revert to previous site designs, this practice helps Muse accurately determine which (if any) changes have been made to the website using In-Browse Editing. Saving backup versions of a site also makes it easier to check if your current .muse file and the live website are still in sync.