let it ring out. do so by keeping your finger on the note while playing other notes...i think thats the way you do it, but u need to know how long to let it ring by listening to the song..someone correct if im wrong
yeah but alot of times they are accidental, like from moving from one chord to another. On the "Official Tab" ones, they have quite a few ghost notes usually, and this is from accidental notes being played.