Always back up. Even when you think you are automatically backing up, manually back up. Manually save documents. Not a computer crash and really not the end of the world, but Word for Mac seems to be a particularly unstable program (for me at least), often when I am working on long, involved documents for a day at a time without remembering to manually save – suddenly telling me that it has insufficient memory, wants me to close a window even though only one is open, and then refusing to save. And not showing anything in the autorecover file afterwards. Ouch. All the many changes to my targeted killing Predator piece made over nine hours today – poof!