Excuse the profanity, but this is really worth watching.

[2011/03 Mike Monteiro F*** You. Pay Me.](http://vimeo.com/22053820) from San Francisco Creative Mornings on Vimeo.

Mike talks specific to the design industry but it applies really to any professional services or consulting business (tech, security, financial, business, etc…). The upshot of it is that you need to think about the potential fails BEFORE you start work and protect yourself from them with a well-written services contract.