If you are a user of Google Analytics, you may want to use the service with one of your Textpattern installations.
Create a form called google_analytics
Assuming you already have a Google Analytics account, login and get the Analytics code for your site.
Enter the above into your new form, and make sure to add your user account id. Save as type misc.
Place a call to Google Analytics in your page template
Just before the closing
</body> tag, place the following:
<!-- google analytics --> <txp:output_form form="google_analytics" />
Once this is done, you should be able up and running. Check your Google Analytics account for reports and options.