Take something that works and change just one thing about it. Small shifts make whole new genres.

Large leaps are hard to make and hard for anyone else to follow. A single variation on something that already works keeps the parts doing the heavy lifting and puts all the novelty in one place, which is usually enough to produce something genuinely different. Most new things arrived this way rather than from nowhere.

Take a form you like and alter exactly one element: the tempo, the length, the audience, the medium. Hold everything else steady, so you can tell what the change actually did.