This document discusses potential use cases for the Cassandra simulation tool to help transform energy behaviors and practices. It summarizes work done at two schools in the UK where energy monitoring led to savings. It then outlines several challenges and how Cassandra could simulate solutions, including: 1) Using symbolic modeling, social norms, progress reports, and rewards to engage customers and illustrate energy usage. 2) Providing live consumption data, efficiency reports and recognition to influence behaviors in offices. 3) Customizing tips, messages and creative representations of usage to promote savings in homes and organizations. Cassandra could test assumptions and solutions for motivating energy efficiency.