ChangeThis is a site that frequently posts manifesto’s that support and spread great ideas. Topics are diverse and most provide interesting reading.
A recent short manifesto that intrigued me was The Six Invaluable Factors by Dave Crenshaw. Basically Dave outlines succinctly the 6 attributes that make one invaluable. The less valuable you are the more susceptible you are to being let go/fired and reduces your earning capacity. Worth a read. Check it out at http://changethis.com/manifesto/show/73.03.Invaluable