Google nuvi paperless geocaching and there is an excellent webpage on using a nuvi for geocaching (it's pilotsnipes or something in the URL). Basically, I use the offroad mode and set it to north up (not 3d). Then when I get close I use the where am I function (or I can hold my finger on the signal strength icon for a few seconds) and look at the actual coordinates of where I am and move around until I'm rght on top of it.