A good tool for introducing lateral thinking. Try this once a group has started to run out of steam with more conventional ways of coming up with new ideas.
You need: 15 minutes, pen and paper, enough random photographs for one per person.
Watch this video
Print off some random photos from my collection.
Credit: Lots of authors advise using images as inspiration: see Alex Osborn’s Your Creative Power, or Sidney Parnes Sourcebook for creative problem solving for starters.