In the book I have been reading called "Business Model Generation", there is an exercise called "The Silly Cow Exercise" which is mean to help people in business get the creative thinking caps on.
You first have to say the kind of thing a cow does : produces milk, eats all day, they moo etc
Then they have to come up with an innovative business model based on the cow. They are given approximately 3 minutes to do so.
Warning! It can produce silly answers beware! But it can help enhance your creative thought.