Over the past hundred years, researchers have reached a surprising degree of consensus about the predictable stages of creative thinking. It was Betty Edwards who first pointed out to me that the stages move back and forth between right and left hemisphere dominance:

1. Saturation: Once the problem or creative challenge has been defined, the next stage of creativity is a left hemisphere activity that paradoxically requires absorbing one’s self in what’s already known. Any creative breakthrough inevitably rests on the shoulders of all that came before it. For a painter, that might mean studying the masters. For me, it involves reading widely and deeply, and then sorting, evaluating, organizing, outlining, and prioritizing.

2. Incubation: The second stage of creativity begins when we walk away from a problem, typically because our left hemisphere can’t seem to solve it. Incubation involves mulling over information, often unconsciously. Intense exercise can be a great way to shift into right hemisphere in order to access new ideas and solutions. After writing for 90 minutes, for example, the best thing I can do to jog my brain, is take a run.

3. Illumination: Ah-ha moments – spontaneous, intuitive, unbidden – characterize the third stage of creativity. Where are you when you get your best ideas? I’m guessing it’s not when you’re sitting at your desk, or consciously trying to think creatively. Rather it’s when you’ve given your left hemisphere a rest, and you’re doing something else, whether it’s exercising, taking a shower, driving or even sleeping.

4. Verification: In the final stage of creativity, the left hemisphere reasserts its dominance. This stage is about challenging and testing the creative breakthrough you’ve had. Scientists do this in a laboratory. Painters do it on a canvas. Writers do it by translating a vision into words.

via How to Think Creatively – Tony Schwartz – Harvard Business Review.