The success of your site depends on knowing what is going on. There are a large number of web analytics solutions available, but here is no perfect solution for everybody. 

Not all information is worth measuring. It can bog you down. What you should measure depends on the goals you set for your site. Whatever you measure has to help to improve your it.

Every site has a unique need. Some areas that you can measure are:

• do you have repeat customers?
• how do you know if a customer is ready to buy?
• how many people actually buy your product or service?
• what makes them stay there?
• what pages to people visit
• who are your customers and how can you get more customers like them?

To help you get started on your way to measuring your site's success do the following:

• review whether your site is meeting your goals
• decide what data you really need
• rank the data in order of importance.  capture internal search stats
• track document downloads or specific links

You can't run a successful website without the right tools. Just like in retail store, you need to know what your customers are interested in, where they browse and where they linger at so you can give them what they need - how they need it.