Governors are developing policies to promote the ongoing transformation of the energy sector into one that is more diverse, efficient, sustainable, resilient and secure. Primary areas of focus include energy efficiency, clean energy, transportation electrification and measures that support protections against cyber and physical threats. For all these issues, governors are supporting new incentives; advancing ambitious goals; working to address concerns with affordability, equity and reliability; and developing new partnerships. The NGA State Energy Toolkit offers ideas to help governors respond to trends as they take action in their states. For each area — energy efficiency, clean energy, transportation electrification, and cyber and physical protection — the toolkit offers an overview of technologies and key policy trends; a summary of opportunities, challenges and key state solutions; and a menu of state policy solutions, spotlighting examples from leading states.