Success I feel, well what I do...relies on: panning skills, candid  skills, knowing the cam, weather conditions, framing the shot , knowing what you want in the end result/frame. Myself, I am hopless at landscapes, waterfalls, not my genre so I concentrate at what I do best!...wildlife  etc etc..and hone my skills towards that!...oh, into portraits atm, (more money involved :)) but not for web use!