I wanted to pass this on because it is one of the best pieces of tone advice I've found in a long time. Laurie Lewis is a local treasure around here. I think she's up for a Grammy with her latest album. She plays amazing bluegrass. Anyway, in the the latest Acoustic Guitar magazine they ask a bunch of guitarists for advice and hers was to carry around sandpaper. she says: "I make sure that whatever pick I use has a smooth edge.... picks with a lot of wear from the strings also sound scratchy. When a pick gets a little worn edge, a little fine sand paper helps it along, followed by a buffing on the blue jeans." Anyway, very simple and I'm not sure why I've never thought of it. I use hard celluloid picks and they are kind of brittle. I used this at band practice over the weekend and it was really great. Good reason to keep reading those magazines! Cheers.