I have a small collection of surface thoughts and I follow those down to other things. If I get into one of those sub-level thoughts but then get side tracked by something else I have to follow the original thought down from its surface thought again to remember what it was I was thinking about or doing.
Today my surface thoughts have been sparse, at best. At worst I'll just stand there blankly while trying to think of something, or anything. I've just been muddling through the day, kind of hoping not to be caught too off -guard.
Oh yes, this song is very good. Trust me. Go download it and space out to it. ;-)