Best instructions I have seen for how to exclude your own traffic from Google Analytics. I was constantly frustrated by my ISP changing my dynamic IP address. With this approach it doesn’t matter. See details here

Step 1: Visit your website.

Step 2: While viewing any page on your site. Type the following in your browser address box. Replace “UniqueWord” with whatever you want.

javascript:void(function(w){try{_gaq._getAsyncTracker()._setVar(w)}catch(e){try{__utmSetVar(w)}catch(e){pageTracker._setVar(w)}}alert(w)}('UniqueWord'));void(0);

This installs a custom cookie on your browser that Google will recognize in perpetuity

Step 3: Set up a custom filter to exclude stats from browsers with the cookie you created in step two. For details on how to do this, see the link above.

That’s it! Works even if your IP address changes.