I feel the more you shoot, the more ideas you will have. You will become familiarized with your equipment and learn what it can do and what you can do with it. Sometimes, I will just drive out to a nearby state park and do some lens tests. The physical act of messing with lenses and equipment frees my mind to concentrate on ideas. Don't concern yourself with rigs or follow focus, just throw a lens on you camera and press the little red button. You'd be surprised at what you can do with just a camera and a lens. If you're feeling fancy bring a small monopod with you so maybe, just maybe you can get some b-roll. And if you're really lucky, the way the sun hits a puddle and the reflection of the flare off the rippling water might just inspire a shot. Sometimes something as simple as a shot can inspire an entire concept.