Most people here I'm sure are aware that you need regular and comprehensive backups on any computer that contains anything you care about keeping. Apple makes this real easy by providing Time Machine, which can be used with any external disk. There are some people recently who only seem to realise this would have been a good idea after their disk has failed, or system got screwed up in some major way. Now is a good time to ensure you are backing up regularly. While the ML update will almost certainly be flawless for most people, it's not something you should be staking the contents of your computer on, if you need that stuff on there. Any update is potentially disruptive after all.
So just a gentle reminder to those who haven't got round to it yet. Get your backup strategy sorted *before* a major update like an operating system change, and persist with it regularly afterwards
So just a gentle reminder to those who haven't got round to it yet. Get your backup strategy sorted *before* a major update like an operating system change, and persist with it regularly afterwards