Scott,
You have a wonderful and awesome website! And even better talent!
Will shooting film help you slow down?...well maybe. But, I think slowing down may take a little more than just film. Will shoot some retro (film) help sales? Well, marketing will.. and film can be a very good direction in helping you achieve your 2 goals; slowing down and sales.
I have shot a few weddings using B&W film only and making contact prints and a fine art book with the pics. It is much more fun than digital that is for sure.....oh, and a lot more work. Shooting film would definitely get you out of a funk. There is a fellow, you may know him, that shoots film only weddings....Jose Villa.
When a film photo is displayed, I think there are certain tangible difference that can be appreciated by certain audiences. So, give it a try.
As slowing down goes, well, my secret was to start shooting with manaul focus lens (Zeis) only. I sold all the zooms and autofocus lenes and switched. Let me tell you, it has changed everything. I am now much more part of the process (experience). I am now looking at the image while I make it...meaning, I watch it being focused and at the same time I am framing. I enjoy the rhythm more and get a much simpler photo. I still shoot from the hip and everything. Its fun to rely on a since of personal accomplishment as opposed to auto-focus. Perharps, this will help you slow down and enjoy the process, also.
Good luck and let us know what you do.
Anthony