1 song per disc helps when you need to find something quickly. I burn 3-4, as many as I can comfortably read the writing on the disc in a dark setting. doubles are not so much if the disc gets damaged, as if you want to play a track next that is on the same cd you are already playing, so more an issue if you burn discs with as many tracks as fit. Printing out the tracklist for each cd is probably a good idea in that case, easier to read. if not burning as mp3, to fit 20 tracks on a cd you must be playing radio edits?