I think you sumed it up best in your last line. I think that 'we' are all too little to explain what 'it' is. It is a feeling, or a hunch, or something along those lines.
I began this thread thinking that I would have a great set of ideas to go out into the field and try. What I learned from this thread is that I already had those guidelines, rules, and procedures - all I had to do was to close my eyes and imagine them.
Thanks again to everyone.