1) This would be the i'm in the mood to get crazy where i improvise on the spot and let it all flow, this usually works well and of course with several rerun-throughs and touching up here and there, it becomes perfect.
2) This is what i have been resorting to lately. I think of what it should sound like in my head and then work it out on the guitar. This is great because i get that, ah!! it's perfect feel. Although, many times it's just alot more empty than when i hear it in my head. I thinks it's because i hear the band with it.