It would be egotistical if if I said I'm aware 100% of the time when the camera is in hand, regardless of high end camera or Iphone. A person's awareness fluctuates most of the time otherwise we wouldn't have car accidents or a broken camera here and there, had a few occasions of both myself! I've past this scene so many times before and standing in this spot looking through the viewfinder wouldn't show me this scene the way it's being displayed on the screen. First you have the idea come to you at some point in time, either at the moment you're there, or before or after. This isn't one of the checklist shots where photographers gather and point the camera in certain general directions. It's an idea that came to me just like every other photographer gets ideas. The idea was worked until everything that didn't relate was excluded. Connect with your ideas until you are fully satisfied!