A once year spring clean is great for clearing out cupboards that contain goods you’ve never used, don’t intend to, or haven’t touched for awhile eg. clothes, books, kitchenware, etc.

You can then list and sell these on online auction websites. A good rule to have is that you will not make any new purchases on entertainment/hobby pursuits/clothing until you have sold enough unused items to afford further purchases using only the money from your sales.