Invest in a dishwasher, that time spent on dishes could be spent studying. Get a large freezer and freeze chopped onions, veg etc. Make larger batches of food to eat over a few days like jacket potatoes and curries. I find it's easier to find 4 half hours throughout the day to study rather than a 2 hour block. Study away from home, at the library or a cafe so you're not tempted by housework.
Suraiya, OU student