There is an article about ten nutrition myths here. The article cites the top 10 nutrition myths and "dispels them".

The list includes things like eating carbohydrates make you fat, eggs raise cholesterol, and vitamins.

One of the items on the list @ number 9 is Drink eight, 8-oz glasses of water per day.

The author contends that you don't necessarily need that much and in fact it is somewhat arbitrary. I won't dispute that, however there is one piece about drinking water that wasn't mentioned.

When you drink cold water your body actually burns calories to warm the water up. Think about that for a moment. Cold water has zero calories, so by drinking it you basically get "free" caloric burn.

HowStuffWorks.com has an explanation of how to calculate how much is burned (around 70 Calories a day) which you can read here.

Like anything too much cold water can be a serious problem as well. You can die from drinking too much water due to Hyponatremia.

Moderation in life is important!