That is the question we answer each day. Do you feel guilty when the answer is NO? Like an athelete training for an event, we feel the need to exercise our craft everyday. So is it acceptable to "think" about photography, or do we need to actually pick up the camera to do something meaningful? For me the guilt is there, especially when I know the external conditions are right (availability of time, location, light, wind conditions, temperature, etc.). But there are things we must do, to manage the rest of our lives, and the rest of our photography. I think each of us must resolve this question for ourselves. There is comfort and solace being behind the camera. But there are also realities of life that ask for our time and attention.