Wow, that's excellent advice, Anna, ideas I've never thought of before. I liked in particular the "last five words heard". At the moment, I'm listening to Radio Two where they're discussing the Pryces and the speeding points scandal. People are ringing up and describing their own experiences of being in prison and, as you can imagine, using lots of fascinating five-word phrases such as "leaving your whole family behind". So many different foundations for stories!
Don't have time to use them, unfortunately, at the moment, as going on holiday in a few days, but will certainly bear them in mind for the future.