Google Analytics
If you own a website or a blog, you need to be using this (really). It's basically just Urchin 6 (Google bought the company earlier this year), but Google is offering it as a free service now (I think it was like $1,000/month or something before Google bought it).
I'm a boy... from San Diego, CA (USA). And I don't really have a whole lot else to say about myself.
