"How do I track visitors to my website?" You have two options. You can either analyse the log files if you have access to download the log files from your web hosting service, or you can use an online tracking service.
Analog - this solution is free and gives excellent stats but you need to have some experience in programming to be able to use it effectively.
Accessprobe - another good and affordable solution.
Google Analytics - Helps you learn even more about where your visitors come from and how they interact with your site.
WebTrends - probably the most well known log analysis software - and there is a range of solutions depending on the size of your business. There is also commerce trends for serious sites. It uses its own database to store the analysed data.
HitsLink.com
Get advanced site traffic analysis, including hundreds of statistics on visitors and their behavior. more...
Visual Sciences - As of May 2007, WebSideStory, Inc. and Visual Sciences LLC have unified under a single brand to focus on delivering real-time analytics applications for enterprises who want to understand and gain insight from complex data to optimize their businesses.
Webstat - another online tracking solution.