Just to note, warrenbuffett.com is not an official Warren Buffett site. The front page does say this - but this article does not. This doesn't detract from the article's quality - just the provenance of this copy.
#11: Listen to your own advice and not speculate in derivatives<p><i>(re: <a href="http://blogs.moneycentral.msn.com/topstocks/archive/2008/11/20/buffett-s-huge-derivatives-bet-proves-costly.aspx" rel="nofollow">http://blogs.moneycentral.msn.com/topstocks/archive/2008/11/...</a>)</i>
my boss always told me you can either save more or make more, and to ways treat those atleast as equals because the savings usually come with free time. I found this advice better than the 10 but that's probably cause I know my boss; I don't know warren