via Daniel: “…going ‘out’ without a map should NOT be one of them.”
A map by itself is not enough. You also need to have at least some clue where you are (“ok, I know I’m east of the highway and somewhere north of the river”) and have a compass and/or (preferrably ‘and’ but don’t count on it) good – and visible – landmarks so you can orient yourself to the map. Otherwise it’s just a paper with squiggly lines.
Oh, and training and practice too ~ without understanding it’s still just a paper with squiggly lines.
In the world of backups, that means having a place to restore to when you need it, and periodically testing your recovery procedure. In part so you know how to do it, in part to make sure the backup really worked like you think it did.