From Lifehack.org. Pretty good stuff if you're stuck.
http://www.lifehack.org/articles/lifestyle/how-to-fuel-your-idea-machine.html
http://www.lifehack.org/articles/lifestyle/how-to-fuel-your-idea-machine.html
Reading books, fiction and non-fiction fuels your idea machine. It gives you fodder to think with. The brain is essentially nothing more than a computer (albeit much more complicated); it takes an input, processes it and produces an output. In other words, you can’t create ideas without inputs. Life experiences and memories are your starter inputs; books allow you to branch out into the experiences of others, in the non-fiction section, and fiction allows you to reach the realm of fantasy - experiences nobody has really had. Fantasy breaks all the normal rules, and so do the best ideas and solutions, so what better place to start?
If you’re worried that by sucking down other people’s ideas your somehow being unoriginal, remember that this is just fodder for your own ideas - and also, if you have any knowledge of literary criticism, remember that authorial intention and a reader’s interpretation are never the same.