To track energy efficiency, start by establishing a baseline of current energy usage over a certain period. This will serve as a reference for future improvements. Then, implement energy-saving measures like upgrading to energy-efficient appliances, improving insulation, and optimizing heating and cooling systems, or start with using any type of energy saving software. Regularly monitor and measure energy consumption after these changes to compare it with the baseline. Use various energy management tools to analyze trends and identify further areas for improvement.