StatCounter is by far the easiest and most consistent analytic tracking programs. It’s free and you don’t need to download any software. You can track many statistics to measure how well your web site is doing relative to traffic.

From StatCounter:

A free yet reliable invisible web tracker, highly configurable hit counter and real-time detailed web stats. Insert a simple piece of our code on your web page or blog and you will be able to analyze and monitor all the visitors to your website in real-time!

• Free, Fast, Responsive, Quick loading and Reliable Service. (Why is it free?)
• Invisible Tracking - no ads on your website.
• Accurate real-time website statistics with detailed visitor tracking and analysis.

Sign up today and start getting a pulse on your traffic statistics free!