I imagine imagination (heh) is most likely fueled by moving back and forth between order and disorder. Opposites create friction, friction creates energy, energy is eternal delight. Also there are two orders of order and disorder (double heh), there is the order and disorder within the mind and there is order and disorder concerning one's external surroundings.
Think about the writer/chaos magician William Burroughs. He has the ability to write lucidly if he chooses, but some of his best writing might be said to be disordered. His personal life was fairly disordered, but he seemed to keep it together enough to not completely unravel. He basically talks about this in his writing. And as far as his process goes, if I remember right, he was fairly organized in that he had a cache of writing that he archived, but then mixed it all up and edited it together to produce the ultimate "disordered" final draft.
Similarly, I remember an old Hong Kong film with Jackie Chan where he was fighting bad guys in a shopping mall. Consider it from the point of view of the director. You have an elaborate set and you can only shoot it once. You have to systematically plan how you will film it with cameras in the right place, you have to edit and cut properly to achieve maximum effect. But from the point of view of the actors, they were obviously told to just destroy everything, completely dismantle the set, and go wild. The end effect was incredibly well organized destruction. It was a sight to behold and I would say it is a good analogy for how the imagination is fueled.