Since people are "poor at predicting what FEB 02 2007
Since people are "poor at predicting what will make us happy in the future" (the term of art is miswanting), perhaps careful career planning is a waste of time. "The best strategy for career planning is this: make your best guess, try it out and don't be surprised if you don't like it." I've done 0 minutes of career planning and I'm happy with the results. See also The Chaos Theory of Career Development.