Depends-- I'm SUPER scatterbrained while having conversations, because I'm a very tangential thinker. The second I catch an amusing pun or think of a fitting anecdote, I'm off and there's no catching me. x3 ("Your paper is really good, but you should work on smoothing out the transitions... hurhur, would you like me to help you find your paper a better gender counselor? OH BY THE WAY did I tell you I have a new transgender character in my plot?! His name is Raine, here let me show you a picture and tell you all about him!" ...you get the idea. XD)
However, when it comes to what I'm supposed to be doing, I organize my life into pulp and then organize it some more. I make to-do lists like they're my JOB, and even without them I'm pretty good at remembering what I'm supposed to do... not that I get many chances to test that theory, since I usually have about 3 seperate versions of a to-do list with me at all times.
(Although lately, I haven't been quite as organized as I usually am. Something about the spring semester just puts a damper on my brain functionality.)