Implementation is over half the battle in web measurement, so you want to make sure you do it right.
Given the complexity of data collection afforded by top measurement applications, knowing what you want to collect before you start is critical. Especially when working with a hosted service provider [Hack #3] or using page tags [Hack #28] , having clear expectations about which data will be collected [Hack #19] can save you time and prevent having to explain why you can't generate critical reports. It's also worthwhile at this point to compare the list of data you'll collect to your original request for proposal (RFP) [Hack #9] to double-check that you're getting what you need. If you don't spend the time getting this right, you'll regret it later.