This year at GDC, I attended a talk by Patrick Curry (lead designer of Stubbs the Zombie) who did an interesting project in 2006 on his own blog - he created a new game design idea a week using these rules:
Only new ideas. This will force me to keep the creative juices flowing, which is the primary goal. But it will also prevent me from posting a game concept belonging to a long-lost friend, co-worker, or company.
No work-related ideas. I will steer clear of all game concepts that are directly related to any professional game projects that I have previously worked on or am currently working on. Of course I can’t predict which projects I might work on in the future…
Only good ideas. This will be the hardest rule to follow. But I’m really going to work hard to filter the ideas down to the gems, and then go into as much detail as possible about why I believe it’s a good idea, and would make for fun gameplay.
I haven't read all of his ideas yet but I really like the idea of this challenge and I'm thinking of taking on myself. Am I crazed? More to come...