Turning off all unnecessary lights, especially in unused offices and conference rooms is an easy way to save energy.
When you save money on your utilities, you are also reducing the amount of energy and water you consume. This, coupled with recycling, reusing and reducing the products you consume are the easiest ways to turn your apartment green.
Common sense techniques are difficult to make habits. Everyone knows that it is important to turn off lights when you leave the room, turn off running water when you are brushing your teeth, but it is only by repetition do these conservation efforts become habit.