I used Backtrack to track my keystrokes over the course of the week. I hadn’t used my computer for anything other than school-work so my words are all related to my projects.
Also, I have noticed how my language changes depending on who I am speaking with. I have some friends, who are not all ITP students, who speak to me mostly about Arduino and Processing stuff. With other friends I joke around a lot more and use ridiculous words. It would be interesting to use Bayesian filtering / spam filter to determine who I am speaking with and parse those conversations as a sort of person predictability filter.