How Can I Track Invalid Clicks?

(More specific information about a tracking system to use was given to the person that asked this question)

Go online and do some searching for free tracking sites that only involve you copying and pasting some code to put on your site. Pick a stats tracker that will let you know where your visitors are coming from so that you can view that information.

I have such a code on my sites/blogs and when I get "invalid" clicks I check the logs and send the information to adsense.

The last time I did this I was able to get the date and time and location of the "invalid" clicks and I forwarded that information to adsense.