Google Analytics allows you to track traffic coming to your web site. It's an excellent too and its free.
I wanted to also track how many people who are visiting my blog click on a specific link I have on the blog. The link I want to track clicks on points to an external site and not to a web page in the blog itself. I have just discovered by mere coincidence that Google Analytics allows you to do this as well using a function called urchinTracker. Now I can know how many people visiting my blog have clicked on that specific link and visited the external site it is pointing too.