There were alot of great comments on my post awhile ago: your resume is meaningless (and building career security, not job security). Please take a moment to read it if you haven’t, as I want to build upon what I wrote there.
I think this issue is relevant again because of the state of the economy. I get the sense that some people are fearing for their jobs. Stepping back and looking at the bigger picture you should never live a single day of your life with any fear – there is no reason for it. It’s simply not a productive use of life. Not if you want to be remarkable and reach your full potential.