In this chapter, we explore the relationship between mind-wandering (broadly defined as task-unrelated thought) and creativity. We begin with an exploration of the evidence that mind-wandering may contribute to creative insights (Aha! experiences) and then explore its relationship to creativity more generally. Although assorted lines of evidence support a relationship between mind-wandering and creativity, this literature has proven to be somewhat mixed: an outcome that we speculate arises because only certain types of mind-wandering are helpful. We then consider the relationship between different types of mind-wandering and creativity, examining both differences between individuals in the frequency with which they engage in assorted types of mind-wandering and fluctuations within individuals across days. This review offers suggestive evidence that particular forms of mind-wandering may facilitate creativity and, in particular, that curious daydreaming (or “mind wondering”) may do so. However, we acknowledge the case remains equivocal as supportive research is limited. We close with a discussion of future directions that may help to more conclusively identify and potentially foster the kinds of mind-wandering that are most likely to promote creative insights and advances

Research has shown that taking a break, or an "incubation interval," can facilitate creative problem solving. One interpretation of this phenomenon is that it allows for task-switching and attentional flexibility, which can improve creative performance. Task-switching may allow individuals to break their mental set and identify solutions that were previously unavailable. It may also encourage the alternation between idea generation and evaluation, leading to attentional flexibility. This chapter discusses the evidence for the benefits of attentional flexibility and its relationship to mind-wandering, and presents a new study on the potential sources of benefit for task-switching on creativity.