There are lots of ways to greenify your office. Let's go through them, one by one, with a few how's and why's on each way we can choose to Go Green.
Probably the first and most obvious tip is the one Dad taught you about greenifying: turn off the lights when you leave the room.
We've all driven through a business district at night and wondered at the lights shining from inside the buildings. How many people were literally burning the midnight oil? Or were they were merely burning through the bosses' money by leaving lights on?
Those thousands of office lights left running unnecessarily not only increase the cost of doing business in the form of higher energy bills, they cost home consumers more as power companies are forced to more and more electricity to cover increased consumption. Plus all those lights left on overheat rooms which then require extra air-conditioning. (With standard light-bulbs, only 10-15% of the energy used is consumed as light; the rest produces heat.) And certainly all that use makes light bulb manufacturers happy, too. So click 'em off. Install sensors in bathrooms and timer lights in supply closets.
And if you haven't already, get some real savings on lighting by switching from incandescent bulbs to compact fluorescent bulbs which use about 75% less electricity.
Your greener planet will thank you.