I've become more and more comfortable putting important personal and business information on Google Apps. It's very convenient to create a document and share it with my wife or other associates of Broadstreet Consulting. More and more, when I need to create a document that is to be shared, I will create it with Google Docs and then share it.
One of the things that increases your "Google Juice" is "Link Love." I'm helping a friend build a Web site about Trout fishing, called www.TroutU.com. I was explaining that Google and other search engines give high credibility to sites that have a lot of links to it, coming from other sites. He asked me how to get others to link to his site, which is a great question.
Google Analytics is my tool of choice for viewing and analyzing site statistics. Here is an image from a recent report about Tyler Brothers, showing the impact of a permission-based email that was sent to about 500 Tyler Brothers customers. You can see that site visits doubled on days when the emails were distributed.
I've become a pretty big fan of Google Analytics and the more I dig into it the more I can learn from the various reports it provides. GoogleAnalytics is just about the easiest Drupal module to install-- it can't get much easier.