Find something, and assume it's the answer.  Then, work out why. For example: how might a banana be a message telling you how to solve the problem?  Is it because (1) it comes from a sunny place (2) it's self contained (3) there's a best time to eat it (4) and so on...  Try it!

Use when you already have some ideas to work with.  Then Substitute, Combine, Adapt, Put to other use, Eliminate, Reverse each of them to get more ideas.  See Mindtools site.

Identify each attribute of something, and consider how you might change this.  Used for developing new products, but works for anything - for example, choose an item, list the attributes, and then see what each suggests about your problem, or that you might do about it.

Pick one that appeals, and then apply it to the problem.  What does it suggest?  See also Metaphors in exploring.

Try the opposite - again, gets round the censor (see why CPS?).  Then, reverse again to get useful ideas.  For example - how could we make this problem worse?  List, then reverse to suggest actions that might help.

What would superman (or Mandela, Einstein, Peter the Great, James Bond or Frank Zappa) do?  Get advice from people who don't even exist!  Also works for people who do exist - what would my Boss say?  Works much better if you can take on the persona of the hero or person, and act out the transaction.  Remember this is a performance art, not an analytical exercise.

In theory, a great tool.  In practice, keeping the "censor" at bay is tough, and takes practice and warming up.  Good alternatives are "Nominal Group Technique" or 6:3:5. - basically, sit around a table with paper and pen.  Each person writes agreed problem definition on paper, plus three ideas.  Pass paper left, add ideas suggested by ones so far.  Repeat 6 times (or as many as works).  See also Reverse Brainstorming, above.