I feel your pain. I recently had an interview for a lecturing job that wanted a twenty minute presentation and it was conflicting with all sorts of other work. What I found was I was procrastinating too much about it and neither the presentation nor the work was getting done. So I took myself off to the uni library for an afternoon and just said 'right I'm not leaving here until it's done' and gave myself a strict time limit. Did it, did my notes then didn't look at it again until the interview. Then, in the interim, I could get onwith other stuff. I'd love to say I got the job at the end, but I didn't, sure yours will be better.