I just ordered a copy of Brian Eno and Peter Schmidt’s Oblique Strategies (wikipedia)—a box of cards with single sentences meant to resolve dilemmas:

These cards evolved from separate observations of the principles underlying what we were doing. Sometimes they were recognised in retrospect (intellect catching up with intuition), sometimes they were identified as they were happening, sometimes they were formulated. They can be used as a pack, or by drawing a single card from the shuffled pack when a dilemma occurs in a working situation. In this case the card is trusted even if its appropriateness is quite unclear.

I’m interested in the idea of decks of cards with suggestions, so I ordered this one for my collection. Others include Writer Emergency Pack and The Daily Project Deck.