Weekends: Playing with 'digital detox × a little creativity'.
On weekends, my rule is 'no spending × digital detox × a bit of creativity,' and the most cost-effective routine was hopping between libraries → reading at a park and jotting down notes on human observations → coming home to summarize short essays or ideas in a notebook. Also, strolls that only go through nearby alleys I've never been to, and a 'cook-at-home challenge day' where I buy only the day’s cheapest vegetables at the supermarket and cobble together a recipe, have a light game-like feel and are recommended.