Yes, free up your mental space for creativity. For instance, I don't need lunch to be a free-wheeling creative enterprise. I can just grab something simple, easy, and available that I know I don't dislike.

Now that I don't have to think about lunch, I can spend that mental energy thinking about other things. With enough ritual and routine, I can even dedicate that mental energy while I do those things.

Ritual and routine don't stifle creativity, they give it the space to function.