http://shoppingourstash.blogspot.co.uk/ has a challenge named "My precious".
The idea is to use something from your stash that you've been hoarding...because it is too precious to use.
In my CK I put a packet of Kaisercraft "Collectables" die cuts and the reason is exactly on topic.
I tend to hoard these because I like them so much.
I've tipped out the contents and made a card.
I even put the cardstock through the cuttlebug....another thing I tend to ignore despite it sitting right here on my desk.