OK, here's my take on Critical Thinking. When I was in NS in 2002 i HATED that word!!! I couldn't grasp the concept either and would shiver everytime I heard it!
Few years away from NS and now "badda-bing" I get it. Crazy huh?
Here's my example of how I can critically think...
I can spot a liar in a few sentences. I listen to what they say, then ask myself if that is even possible, or could it have happened that way. They will usually say something that lets me know their story is just that. Most people around, hearing the story, would just wonder if it were true. I pick apart the pieces and uncover the untruth. Then others can see it when I tell them the inconsistancies I spotted. They were not critically thinking, but I was. They didn't look outside the "box".
I know this has nothing to do with Nurse's using critical thinking, but it is an example of how it can be done in other situations.
I just took a huge Microbiology test, so if I sounded insane with my answer, it is because...I am!
Sorry if this did nothing for you.