Storing your Raspberry Pi configuration in Git
Storing your Raspberry Pi’s configuration files in Git is a great way to protect yourself from really bad accidents. You get a backup of all your configs and revision control to rollback those nasty changes. Best of all, you don’t have to manually create backup copies of each individual file. (cp rc.conf rc.conf.bak anyone?)
I should note that I’m running Arch Linux ARM, but this should apply fairly equally to Debian and other distros.