Thank you all very much for taking the time to reply to my question , I think deep down I new that this wasn't going to be straight forward but then again if it was easy it wouldn't be such fun . So to try and break it down a bit areas that don't add anything to the shot should be cropped but there are no hard and fast rules to it ,you can have a shot full of plain back ground but with just one small focal point in the corner that can be just as interesting as a shot full of action what looks right to you is what matters . I think the more experience I get with my photography and editing the more natural this will become , I do try to get as much right as I can at the time of taking the shot but a prime lens and a bridge with a 20 ft drop into the river stopped me with this shot of the Egyptian geese .