This is an attempt based upon US DOE: 2003 US Commercial Building Data to give you an idea of where your energy in your building is going.
14% Space Heating
11% Space Cooling
6% Water Heating
This gives you an idea that you should be focused on Lighting and your Heating, Ventilation and Air Conditioning (HVAC) systems when looking for areas to save money on your energy bill and which areas you should be focused on making more energy efficient.