It seems like an obvious suggestion, but you can always say no to a trip to tesco's, put your slippers on, close the curtains and watch your favourite old film?... the world won't come to an end if you go shopping tomorrow!
Take a look at what is it that makes it your favourite film, there's probably something quite profound going on. perhaps something about it moves that right brain on a fundamental level.
"Today's a day of big decisions - going to start writing me novel - 2000 words every day... I'm going to start getting up in the morning".
(Tom Courtney in Billy Liar 1963)