In this lesson from Yale's Creating Change through Social Entrepreneurship course, students learn strategies for improving the operational efficiency of a social enterprise in order to reduce costs, scale impact, and reach financial viability regardless of the venture's specific business model. The lecture presents a set of concrete practices aimed at helping founders do more with limited resources, a persistent constraint in mission driven organizations. Building on the prior lesson's survey of revenue models, this lesson addresses the cost side of a venture's finances, preparing students for the following lessons on financial templates and funding sources.