Funders and developers of infrastructure projects and businesses and managers overseeing critical natural resources are becoming increasingly aware of and interested in ecosystem services. Quick, simple, transparent, and low-cost ways for incorporating these services into decisions are just now under development. One tool that can support widespread implementation is ecosystem services conceptual models. This report facilitates development and use of such models in federal decision making by presenting a “how-to” guide and illustrative examples. It is part of the Conceptual Model Series produced by the National Ecosystem Services Partnership.