Turn off non-essential lights and appliances. Example make sure all bedroom lights, fans, air conditioners etc. are turned off when the whole family is in the living room watching Television.
Avoid running large appliances such as washers, dryers and electric ovens during peak-demand hours from 6:00 am to 9:00am and 6:00pm to 9:00pm.
Fridge doors should not be left open for longer than necessary. [cold air escape]. Hot or warm food should not be put straight into the fridge (need to cool down first).
Fridge should be regularly defrosted to keep running efficiently. If it tends to frost up quickly, the door seal should be checked and if the fridge is next to a gap cooker or a boiler, a good should be left between them.
Buy Energy efficient appliances, products and light such as the compact fluorescent lamps instead of incandescent bulbs.
Turn off all unnecessary lights, especially in unused offices and conference rooms and turn down remaining lighting levels where possible. Take advantage of natural lights where possible.
Use skylight for roofing of production floors and ware houses.
Set computers, monitors, printers copiers and other business equipment to their energy saving mode and turn them off during long idle periods such as lunch breaks and at the close of the day. Minimize energy usage during peak demand hours from 6:00am to 9:00am and from 6:00pm to 9:00pm.
Ensure that offices having air conditioners have properly sealed windows and all doors are closed when the air conditioner is in use. Make sure your air conditioner is switched off at the end of the day. Again switch it off when you know you will be leaving the office for a longer period. Ensure regular maintenance of air conditioners.
You could install simple motion detectors with your office lighting and air conditioner systems to turn off lights when not needed and cut down your energy consumption