You can take the fifth, plead the fifth, play a fifth, drink a fifth (not recommended, though), and even listen to Beethoven's Fifth.
You can also read about, change your life because of, improve your relationships, and make the world a better place by using Peter Senge's "Fifth Discipline"--a study on systems change. Although I'd read snippets of the book before, I listened to the first half of the book on my iPod last night while driving to and from my daughter's softball game. I was so engrossed in the book that I almost drove past the exit on the highway--it really is that good.
The basic premise? We are not individuals in this world, working alone, independent, disconnected from others. Everything we do impacts lots of other things and lots of other people. Decisions we make, things we say, actions we take--like the ripple effect in a pond.
That's a very, very, very abbreviated (and not even a complete) snapshot of where the book begins. It then goes on to talk about learning and growing, owning and sharing vision, learning to work together, strengthening trust and relationships, and practice...practice...practice.
Good read. I'll hopefully finish it tonight, on the road to another ballgame.