Don't think, feeeeeel.
[url="http://www.google.co.uk/url?sa=i&source=images&cd=&cad=rja&docid=McvkSra5JLZGjM&tbnid=vA1O_Y-Zgvj-kM:&ved=&url=http%3A%2F%2Fgree.jp%2Fokamoto_ryoji%2Fblog%2Fentry%2F588841918&ei=nvEkUdi9GujW0QXYz4CYDw&psig=AFQjCNETUHhWtyzOUO4x8RUB4JrK8A47BQ&ust=1361462046476177"]url[/url]
Na, seriously, I'll tend to think to the end of the phrase, but my phrases tend to be little ones. Generally I'll get a pitch in my head relative to the chord I'm playing over/under, so that'll form the basis of my playing - generally the root of a mode.