I always seem to think touching that rock will make things look better so I do and then about an hour later I am cursing and ****ed about touching that one rock...Then I give up because the lights go out on the tank, go to bed (I always seem to do this at night) and put it all back in the morning to how it was before I moved that one rock.
Actually I don't do that anymore...I just leave the tank alone now and rarely move anything but it seemed to take me a long time to learn that lesson.