Depends on what kind of music you want to learn to play better. Since we already know you're playing an acoustic, are you wanting approach it at a fingerstyle point-of-view? If you're wanting to go this way, you may want to look into attempting different songs by Doyle Dykes, Leo Kottke, etc... All just depends on what you're going for. If I think of anything that can help I'll try to put it up here, nothings comin to my head right now though, hehe.