I have been seeing on linked-in some questions about creativity and I believe there are several aspects of creativity that have to do with different parts of the brain in the physical sense as well as an openness and willingness to connect with that part of the self. The act of creating images, words, etc. for me is an act of being absent for a while. If I know what I'm painting and think of what I am painting I tend to push paint around, it's when I instinctually and usually quickly create a work of art, that's when I feel like I have truelly touched that part of the brain.
In my experience, the right brain has its own connections and relations of words and objects that don't necessarily have any comparison from a logical side. The motivation and feeling of creating art and writing is intangible and the work pretty much creates itself. The conscious side of the brain fights with the creative subconscious side and questions the comparisons which creates breaks in the creative process.
When I sit down to write, it usually is from many different snapshots of things from the day and the images and thoughts create paths in words-this is referred to as a trial web shift when the right brain kicks in adn takes over.
I collect images from places-it might be the way light hits the water or the way a field blows in the wind and when I paint all of these images come together from memory. I use photographs to support the images that I see but memory fills in the gaps. In the future I plan on getting more observation in before the act of painting and more drawn studies to emphasize more details.