Sometimes an image strikes you, calls out to be made and your experience, knowledge of the subject and of your materials. and even the pictures you got wrong before all intersect at that decisive moment when the magic happens. More often, you have to learn a subject - see it (or imagine it) under different
conditions, better lighting, even another season weather-wise. And there are times when you can over think something and just need to get yourself out of the way and get to the important part: making an image of what stopped you in the first place.
I walked by this row of bricks, stared at it (and they stared back at me) in 2011. The arrangement, line and texture of it spoke to me immediately but I didn't get the camera and kept wandering. Over the next couple of days I looked at it again in the morning and afternoon (even once at night) and talked myself out of making an image under the flag of "this would be better with the sun on it". As it was place I could only get to once a year I would invest a year into thinking about it and realize it was fine just the way it was - in fact, direct sun and the resulting shadows would have interfered with the form I found so appealing.
Sometimes the place isn't ready, the light would be better at another time. Sometimes it isn't the place but the worker that isn't ready to see it.