Joining the Cincinnati Preservation Association http://www.cincinnatipreservation.org/ is one of the best things you can do to help preserve and save modern buildings in the Cincinnati region.

Cincinnati Preservation Association is a private, nonprofit, membership organization that serves the Greater Cincinnati community as the recognized resource and catalyst for the preservation of historic cultural resources through education, advocacy, and technical support. Historic cultural resources include architectural and archeological sites, historical public art and monuments and landscapes.

Go to the membership page, fill out the form and they will send you membership information.