File -> Preferences.
It has options for auto-saving, and making auto-backups of normal saves.
I'm not a big fan of auto-save features, but I'd recommend setting at least 3 auto-backups.
I keep 5 auto-backups, and routinely increment the version number on the end of the file name when I make a significant addition or change. This results in a lot of backups, but can often come in handy. Even if it's not a corrupted file that screws you, imagine that you tried to make a significant change that doesn't work out well... You can always roll it back to undo your mistake.