Invaluable

In today's shaky employment environment, I wonder how people are making themselves invaluable to their employer. There is much competition and it is very difficult to find good jobs. When I was a teenager, my brother-in law told me something that has stayed with me all these years, he said "make sure your boss NEEDS you". I think this is an important message to remember.

How are you making yourselves needed within your sphere of influence? What extra work are you taking on, or what creative ways do you add extra value to your organization?