The easy way is to use TangoGPS, just be sure not to use the suggested convert2osm but rather the convert2gpx, uploading the osm files created by the first script is not a good idea as they may overlap existing roads. You should use gpx files and trace them manually so you only add new roads or update existing ones.
OpenStreetMap
Discussion
Comment from HannesHH on 5 October 2008 at 09:50
Here you go: osm.wiki/index.php/Beginners'_Guide
Welcome aboard and have fun!
Comment from Baruch on 5 October 2008 at 13:15
The easy way is to use TangoGPS, just be sure not to use the suggested convert2osm but rather the convert2gpx, uploading the osm files created by the first script is not a good idea as they may overlap existing roads. You should use gpx files and trace them manually so you only add new roads or update existing ones.