Yeah, it's like a disease, really.
Creativity is like an itch. When you scratch it, it feels good, and then it itches more. You fulfill the aesthetic urge and it pushes you to create more.
But if you don't have the itch to begin with, it's hard to know where to scratch. There's no way to "get ideas." It can't be forced. They just happen. You're eating breakfast one day and you have an idea, and either you forget about it, or you work on it and execute it. The more of your ideas you execute, the more ideas occur to you.
-Drew ("Toothpaste for Dinner")