I agree that everyone has to find there own comfort zone with technique, but it becomes easy to be paralyzed by it also. I went on a little road trip one Saturday and drove about 80 miles with my 4x5 to photograph some machinery I had seen on another day. How it happend I don't remember, but I dropped my light meter I had had for several years and it broke. Crestfallen, I was stumped. Wasted all that gas and time. then of course I thought for a moment, used the sunny 16 rule, opened up one or two stops to ensure I got good exposure in the shadows. Amazingly, the negs turned out about perfect or as well as they would have been with a meter.