Here are some interesting nudgets of humanly wisdom that I came across the internet. I thought they would be good fodder for our thoughts here.
Kai's Example Dilemma: A good analogy is like a diagonal frog.
Etorre's Observation: The other line moves faster.
Hofstadter's Law: Everything takes longer than you think it will, even when you take into account Hofstadter's Law (Douglas Hofstadter, Gödel, Escher, Bach: An Eternal Golden Braid, 20th anniversary ed., pub. 1999, pg. 152 of chapter 5.
Boren's First Law: When in doubt, mumble.
and last but the best
Minksy's Second Law: Don't just do something. Stand there.