Google AdSense provides publishers of content the ability to host ads from the Google Contextual network fed by AdWords. Many people already know that this has caused a great influx of MFA's, or made-for-AdSense sites. Some people have thought in the past that it may be possible to generate income by simply clicking on your own ads. Of course, Google has a way to prevent this from happening, and it is tied to your IP address(es). However, there are still some people who occasionally accidentally click on an ad.
A recent thread at Digital Point Forums offers some advice as to how to avoid clicking on your own ads, thereby possibly getting kicked out of the AdSense publisher program for click fraud.
Use a few php lines to determine visitors IP address, if it's your own then set AdSense to show ads for another account (such as one of your friends' or a random id number). This way even if you click on the ad unit while performing webmastering duties, your account will not register this click.
Some good discussion follows, including some sample codes to use to help avoid this rare accidental problem. Of course, the number one response was simply "just don't click on your ads." However, as one participant points out, some laptops automatically click on a link when the cursor is waived over it (remind me to never get that product).
Join the discussion and ad your thoughts at Digital Point Forums.