Turn off lights when rooms are not occupied. Replace inefficient light bulbs with LEDs.

Caulk and weatherstrip windows and doors

Disconnect unnecessary or unused equipment

Install programmable thermostats

Take advantage of winter daylight by leaving window blinds open

Install awnings, window shades, or window films to keep out the summer sun and lower air-conditioning costs

Install occupancy sensors in areas not continuously occupied

Fix leaky faucets and toilets to conserve water

Purchase ENERGY STAR office equipment that you can take with you if you move to another location