It applies more to writing than to speaking. In writing, you can always re-read a passage, in speaking an elaboration or a repetition can sometimes help to make your point.
Papers are always an enormous struggle in that respect. I'm always seeing connections which I find interesting to think about, but not really relevant to the subject (same applies for reading - I sometimes get lost in irrelevant literature).
I'm always amazed when people tell me that they were about to hand in their paper but it was "much too long." I literally struggle with every page and am usually at the lower limit.
It takes a lot of effort to arrange my thoughts in a sequential pattern because, frankly, my mind doesn't work that way (as opposed to language) - I think of a lot of stuff rather simultaneously, and that's rather messy. The bad thing is: I'm often afraid that some brilliant thought I have simply vanishes from the screen. More than once I felt the urge to immediately rush to my desk or take a note to put down the inspiration I just had. That can happen anytime, even when I'm doing something completely different at the moment.