“When a moodboard is too vague and a comp is too literal,” it’s Style Tiles to the rescue! This downloadable Photoshop file (created by Samantha Warren) is awesome enough, but the site also includes a guide of how to use style tiles. It’s just plain good advice for dealing with any design clients.
Here’s what the template looks like when you’ve got it downloaded and unzipped:
It’s an editable Photoshop document, so you can go wild with it, like this: