This document summarizes key experiences and lessons learned from fostering open educational practices (OEP) based on a case study of The Open University in the UK. It identifies five important factors for encouraging openness and engagement with open educational resources (OER): 1) necessary infrastructure like legal and technical tools, 2) opportunities for use and communities of learners, 3) design considerations for open content and models of use, 4) adoption of OER into institutional practices, and 5) supportive policies. The Open University's experiences with its OpenLearn platform and OLnet research initiative provide evidence that embracing openness enables innovation, collaboration, and new educational opportunities.