It’s a question that is always asked of writers. It’s not like we go to the grocery store and stroll down the aisle with the baking, spices, and ideas. There’s no shelf with neatly packaged inspiration just below the pancake syrup.
Some say it’s the collective conciousness. Perhaps. To me it seems the more I write, the more ideas come into my head. Where do they come from? Something we saw or heard? Where did George Lucas see or hear a wookie? The imagination is grander than we can measure.
Ideas come when we are open to them. Open your heart and mind, and just let them in.