Since the Global Conference on Climate Change, Food Security and Agriculture held at the Hague in 2010, the concept of climate-smart agriculture (CSA) has gained increasing attention at international and national levels, with several countries initiating related activities. The objective of this paper is to highlight recent experiences with country-level implementation of CSA to identify some key lessons to incorporate in ongoing efforts to expand the use of the approach in developing countries. Section 1 describes the evolution of the concept of CSA since the Hague conference. Section 2 introduces the building blocks for developing a CSA strategy and combines them into a coherent framework. In sections 3 to 6 the paper goes into more depth on the building blocks, the data needed and potential approaches for prioritizing action. Finally section 7 provides some guiding principles on CSA investments.