Editors are, too. But it is often difficult for me to force myself beyond the ordinary and catapult my imagination to combine extraordinary elements into plausible situations that will intrigue readers and editors.
Brainstormer by Tapnik is an app designed to prick your imagination and tempt it to try something different. It features a wheel with three elements: a plot, a subject, and a setting or style. Move each wheel individually to select from the myriad of possibilities. Or (my favorite), click on the dice to let it randomly select a combination for you.
Some combinations are very unique (healing journey, undead, chef), however, I don't rule out any combination too quickly. I let it percolate in my creative juices for a while and see what happens. Even if I can't pull it together into a submittable piece, I use the combinations as a jump start for a free-writing exercise (which often does lead to a saleable piece).
Click on the settings button (the cog picture) to see three other brainstormers: Character Creator, World Builder, and Imagined Animals.
So maybe my next book will be about a majestic rhinoceros hiding in a prehistoric windmill who smuggles diamonds as part of a revolt movement.