After sketching a few ideas, one can take these rough sketches to the next level with wireframes. This is a great way to explore more ideas, yet not commit yourself to a high-fidelity design. I created this wireframe in Adobe InDesign because that program is quick and easy to use (for me) and has all the functionality one needs to create a wireframe.
The final step of the design phase included mocking up the page in Photoshop. Granted, the interaction and motion of the elements cannot be simulated in Photoshop. But a developer could work from this mockup with accompanying annotations and notes and discussion.