Being a full time student and being employed full time, I find that productivity matters more to me now it ever has before. I've been suprised at how interruptions in my study or work really throw me off. Particularly, becuase for much of what I am doing, it takes a while to get everything in my head so I can understand what is going on, and it seems that one teeny interruption can crash the whole thing.

I've came across a great little description of what is going on at 43folders on Flow. Also, a software programmer I know sent me this little article on the challenges of multi-tasking for computer processors and programmers.