How cool is this? Strava has a new feature where you can make a "heat map" of your rides. The more you ride a route, the redder the line gets. I've only been using Strava for a bit over a year. I wish I could do a heat map from all my GPS-tracked rides, which started in late 2007.
You can look at the actual readable, zoomable version of my map here, and make your own as well. If you do, post the link in the comments, or at least share it with me.