Larry Ferlazzo's recent post mentions ways to keep aware of where traffic is coming from to get to your blog or website. He also gives ways to make sure your links are up to date.
I followed his link to Sue Waters' Edublog in which she gives great instructions on how to interpret the complexities of using google analytics.
I have used this google site for a while and have seen the effect on readership of emails to parents. I'm only just beginning to see the potential of the analytics site.