It sure seems as easy as can be to most of us, but sometimes clients just don't understand how to use tags in Drupal. They get the idea - you make a list of words which generally classify the text you just wrote. When it comes time to put those lists in though, you see some of the funniest fails.
What's the problem? Its those pesky commas that you use to separate the tags. I know, all you have to do is add a comma between your tags. But with spaces thrown in the mix, invariably someone gets confused.
Just about every webmaster has seen what Google Analytics can do. Its a very flexible and powerful system to track what visitors are doing on your sites. Many people don't realize though that you can easily track user segments also. If you have a large number of users who create their own accounts, then one module which can really help with this is the Auto Assign Role module.