 I was just looking at Oblique Strategies. It’s a deck of cards that you consult a bit like an oracle or the i ching when you are stuck on a problem, the general implication being you are a creative working on something. It was originally authored by Brian Eno and Peter Schmidt.
There’s an online version here. Part of what is interesting is the personal contract with yourself necessary to use it; you have to convince yourself you are going to follow whatever advice the card gives you.
Something that is also fascinating– this deck of cards has been around since the 1970s, and the original editions, which were all signed, sell on ebay for crazy amounts of money. I wonder if the buyers are actually using the cards…