Luckily, Jamie Rubin has posted a way to automatically backup your Evernote data. (We've talked about the manual method before, but a set-and-forget approach is easier on us all.) He uses an AppleScript (shared on GitHub) combined with automating tool Lingon to back up his notes once a month.
Windows users can check out Jose Esteve's batch file posted in the comments.
If you rely on Evernote, imagine how you'd feel if all your notes disappeared because of a glitch or some tragedy. Head to the link below for the scripts.
Going Paperless: How and Why I've Automated Backups of My Evernote Data [Jamie Todd Rubin]