The first thing I do with any new project is to create a pinterest board, or basically a mood board, of things that might visually relate to the project. I find pinterest a very useful tool for this, but the biggest downside to using an image gathering site like this is that images are sometimes not sourced properly. So sometimes I will find some art I really like, but will have no idea who made it. (On the upside tho, a reverse image search on google usually does the trick.)
You can find my pinterest board for this module here.