An interesting group of insights from some of the more successful individuals around:

How to Succeed in 2007 : http://money.cnn.com/magazines/business2/howtosucceed/index.html

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Updated 2021 : note that the above post is out-of-date, given this post was originally published in 2007, but is left here for archival purposes. I have unlinked the original external link as it is now dead.