I used to be so pro active with my homework all the way until my second year at university when I began living with a room mate. I would complete pretty much all of my homework tasks on the day I had them given to me. I was such a model student back then, though I didn't have a social life which hasn't really changed over the years LOL.
But yeah, my room mate's habit of procrastination caught me and like Shining Raichu, pressure became a damn good motivating factor, often finishing assignments mere minutes before the dead line. One of my friends submitted a course work seconds before the dead line looool. He intended to submit it like half a minute before but the computer lagged and he only just got it in on time. Apart from pressure, my motivation for getting academic tasks accomplished would have been my general desire to do well at school and university.
As far as house hold duties are concerned, I am a firm believer of "if you look after your home, it will look after you" and so that is the main motivating factor there. I can usually get most of the house hold tasks done in one fell swoop but occasionally I'll do it in two rounds.