You think I use the same technique over and over again? You are sadly mistaken. I have a very good system going for me, and it boggles my foes, like lets say i hide behind a box and cap them the first time. The next round, they come by that box, but im not there, when they turn and start firing where I first was, I jump out and kill em. Very simple yet affective method.
Now, I am opposed to camping, I hate it, so usually I am constantly moving, yet ever time I find a place to grab cover, such as a step to a doorway, I crouch for about 5-10 seconds to check out my scene.