Austerity for financial reasons, or loss of enthusiasm during dark winter days (or other seasonal challenges) can be overcome with some games that could fire your creativity.
I like Una's idea of trying a different silhouette throughout a week. Tracyliz67 has one I like to do that involves bringing one item from day 1 forward to day 2, and so on for a '5 days of separation' kind of experiment. I like to play with colour and will do a week ( or month!) inspired by a colour or colour combo. I like copy cat challenges too.
So, shopping excluded, what clothes closet games do you like to play?