Luc Bors presented tips for UI reuse in Oracle Application Development Framework (ADF). He discussed using page templates, declarative components, stylesheets, and task flows to create reusable components. Page templates allow defining common page layouts and styles. Declarative components encapsulate combinations of ADF Faces components. Stylesheets define common styles. Task flows create reusable multi-page flows with input parameters and output events. These reusable assets can be packaged in ADF libraries and shared across applications.