A while back I signed up for Google Analytics. It’s their free service for tracking the traffic to your site, conversion rates on internet marketing efforts, etc. I signed up for the service, but hadn’t really spent much time screwing with it.
For a free package, it really is pretty good. It’s definitely better than the package I’m paying for (albeit for a very short time longer) from my provider. I’d recommend you check it out if you have your own website and want to see how many people are coming to it, where people are coming from, and what they’re looking at.