Paul Sloane in his article Don’t Just Do Something Different; Do the Opposite! in a very light way tells you examples when people did exact opposite of what was prevalent and hence was common sense, and in the process created a whole new world or a whole new way of doing things.
Best example is of course the open source software, which is opposite of fiercely guarded code, but it is a phenomenon like no other in the software world.
Can this be a technique of coming out with new ideas? Doing opposite, or removing the basic function / process that is core to the way things are done currently.