You get in trouble not at the moment this happens, you get in trouble much earlier than that - when you allow yourself into a situation where a single typo lead

You get in trouble not at the moment this happens, you get in trouble much earlier than that - when you allow yourself into a situation where a single typo leads to ruin. Myself, I use TimeMachine and bitbucket on my Mac, and every-15-minutes snapshots on all Amazon EC2 EBS volumes. Similar solutions can certainly be found for your platform of choice.