This may seem unconnected, it is not.
http://www.43folders.com/2010/01/26/godin-linchpin
Audio interview with Seth Godin - author of 'Linchpin' a book which among other things deals with the
lizard brain, protecting the well, and
beating back the fear and resistance that drive mediocrity. Audio deals with the lizard brain portion. Page also contains a video on the Lizard Brain.
Listen/watch with an open mind, forget about the area he is talking about, it applies to all areas.
video is on the page, embedded with player - separate link here also
http://www.vimeo.com/5895898
His definition of 'shipping' is actually finishing something, taking it through to the end.