I have pondered over this question I know what I am currently learning and also need to practise and improve upon which is lighting, flash and off camera flash including exposure. I guess the other thing that has come from this is I really still don't understand when I need to adjust "one or two stops" or exposure compensate I normally just move my f stop and/or shutter speed re-test then adjust again if necessary I would like to be able to know off the top of the head what to do properly.