“Only when the brain is confronted with stimuli that it has not encountered before does it start to reorganize perception. The surest way to provoke the imagination, then, is to seek out environments you have no experience with. They may have nothing to do with your area of expertise. It doesn’t matter. Because the same systems in the brain carry out both perception and imagination, there will be cross talk.”
–neuroscientist Gregory Berns, MD, PhD, in a 2008 article titled Neuroscience Sheds New Light on Creativity
So when you’re stuck, do something new, something different. Big or small, change creates new paths for thinking.