This document discusses aids to decision making for sustainable land management. It identifies three main points: [1] the need for robust, cost-effective methods of estimating costs and benefits of land degradation/sustainable land management; [2] better understanding how land users make decisions; and [3] how to reverse 'investment deserts' of degrading land. It analyzes gaps in tools for evaluation and proposes using a total economic value framework combined with the Millennium Ecosystem Assessment to measure various land services. Harmonizing methodology across scales and contexts can help estimate total economic value and inform sustainable land management decisions.