I came across this insight of Stephen Dubner, one of the authors of Freakonomics (a really good read, by the way).
Dubner explains the virtues of quitting to Tess Vigeland, making the case that people don’t quit enough
Here's the link to the short radio program clip: http://www.freakonomics.com/2011/06/29/quitting-time/
[Edited: 2011 Jun 29 16:53 - fateundermined:153556 ]
I would like to do strategic quitting but I am not bold enough. Maybe I do early retirement some day. I will be so happy then.