What are some options for Backing Up & Restoring Joomla! instances? Preferably ones suitable for staging.
The easiest way I've found is to use Akeeba Backup. Very easy to use and free.
While Akeeba Backup is without doubt the most popular backup solution, I would like to add that there are also other solutions. You can get a list of them at JED: http://extensions.joomla.org/extensions/access-a-security/site-security/backup