I found a GPS out on the trail one time. I still have it and use it on long rides. It's great for finding your way back to your trailer. I have a lot more confidence about not getting lost when cutting cross country now.
I should also mention that I tell my fellow riders all sorts of trivial statistics since I found my GPS. Such as, "sunrise is at 6am," "sunset is at 7 pm," "we are only traveling 2mph," "the time is now 11:31," "we've been gone 4 hours," etc! Actually, I think the clock function is what I use the most. That and tracking where we've been and our starting point. Now I don't even need to wear a watch. Haha!