What do you want, or your business to achieve with a Web presence?

If your Web site or a single Web page already exists but you are not sure how well it performs, begin some free Web Analytics, in less than an hour.
Ask yourself how you define a successful performance?

Resources:

How to Choose a Web Analytics Tool:
A Radical Alternative
http://www.kaushik.net/avinash/2006/09/how-to-choose-a-web-analytics-tool-a-radical-alternative.html

Beyond basic Web Analytics
Usability Analysis
Customer Insight
Operations Management
Design Studies & Testing
Fraud and Audit
Campaign Measurement
Audience Profiling

See: http://www.speed-trap.com/applications.aspx
 

Free Visitor Tracking and Web Analytics

http://www.google.com/analytics/