What are really good resources on using Google Analytics? I don't check more than my pageviews, referrers and popular search terms, but I know that barely scratches the surface of what it can do.
http://www.google.com/support/conversionuniversity/bin/reque...
Conversion rates give you 'value': - 500 visits from source A, 10 sign ups, 2% conversion rate - 100 visits from source B, 10 sign ups, 10% conversion rate