From Jason Burby at ClickZ
Many of my previous columns have focused on identifying desired behaviors, setting site goals, then determining and acting on opportunities to improve performance. Goals must be set and action taken, but be sure the site is configured to provide accurate data based on those goals.
It often isn't enough to place a basic standard tag on every site page and assume it will provide the required data.
With all the pressure on budgets and resources, it's unacceptable to roll out a new site or site changes that can't be tracked effectively. And you don't want to be the one to tell higher-ups you don't know how the new site or site changes are doing since the tags weren't placed correctly.