answers.com: career : ..Doing what one does as a permanent occupation or lifework..
David Maister’s Perspective on Careers was very timely 
The followup post Ayn Rand is good too : ..The key message is that the willingness to take responsibility for what happens to you, and to make things happen, is the beginning not only of healthy thinking and exciting productive careers, but also of a life of integrity, standards and relationships. These things, I believe, are connected..For those who need an introduction, Ayn Rand was an author who wrote “The Fountainhead” and “Atlas Shrugged,” two novels that communicate her philosophy of “enlightened self-interest.”..
btw: How to Quit should be known too just-in-case !
careerone.com.au: Smart way to say: I quit
Every company should have an exam similar to ARSE