Chapter 9 addresses research questions for issues related to restoring degraded beach/dune systems. The case is made that restoration is not just a two-stage process that should only be evaluated by comparing before/after conditions but a series of ongoing changes in human and natural processes. Many restoration actions must be episodic to be successful in the long term, and managers should be able to address negative aspects through adaptive management. Viewing developed coasts as a coupled nature–human system offers new insight to the types of restoration outcome that can develop, but further research is warranted and a wider range of implementable designs will be needed in the future. Research questions addressed here include ones that are generic and broad scale; ones that are more site specific and applicable to individual projects; ones that address negative side effects; ones that are research oriented; and ones that are intended to guide managers.