Decision-Making Biases

I was fascinated by this Wikipedia list of decision-making and behavioral biases, with links to each one (including references!) like the
Planning Fallacy.

Update: Mutual Improvement deconstructed a suspect study connecting alcohol consumption and higher incomes with another list of cognitive biases taken from Wikipedia.

Update 2: I was looking through a list of del.ici.ous links on decision making and found this article: 10 reasons people make stupid decisions -- it's funny and references some solid background material.