How best to backup a Jenkins install?

I would like to back up our Jenkins installation - the jobs and general setup - in case something happens to the machine, but also so that people can install the same setup on another machine. Is there a certain set of files I need to make sure I back up? Should I regularly backup the whole Jenkins home folder? Is there anything outside of the Jenkins home folder I need to make sure I back up, besides the .war file?

Thanks!