As you probably know, while you're busy navigating from cache to cache, your GPSr is doing more than just showing you the cache locations. It's also recording your tracks. And the beauty part is that you can load these tracks (and your waypoints) into Google Earth once you return home to see the exact path you took while out hunting caches.
There are a number of programs, like GPS Utility, and/or web sites, like GPS Visualizer, that will let you download your GPS track and waypoint data, and convert it to a Google Earth (KML) format. You can also import native GPSr file format (GPX) data directly into Google Earth.
You can also either download your waypoints (presumably, your cache sites) from your GPSr, or turn on the Geocaching Network KML layer we mentioned in a previous post to see all the geocaches you passed, and hopefully found, during your outing:
Google Earth is a great tool for planning your next hunt, and viewing the results of your last one.