In my opinion, one of the important aspects of being context-driven is having a somewhat philosophical approach to testing. Asking questions, being skeptical, questioning the validity (‘validity’ as in construct validity) of wat is being said by you and others.
This means you have to own your approach to testing – in two different ways. First of all, it is your personal, custom approach and no one else’s. There is no external authority refer to; you are your own authority when it comes to explaining and defending your test approach. Secondly, you know your approach it inside out. What’s in there is there, because you decided so. And you can explain why. You can describe your approach in three sentences, three hours or three days depending on the situation.