Handy Hint 30 - How do I quickly fix a mis-behaving app on my iPad and iPhone, or a device that is mis-behaving in general?

What do your do if you have a frozen or non-responsive app, or an app that is not doing what it should, or your device won't connect to WiFi and other built-in features, or your phone won't work on your iPhone, or perhaps even your Home and Sleep buttons won't work.

This Handy Hint has been moved - view it here: How do I quickly fix a mis-behaving app on my iPad and iPhone, or a device that is mis-behaving in general?

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