We can all learn from Parisian flower shops. Make your shop inviting, always have fresh flowers on your doorstep. Oh, and smile and dazzle your customers with your bouquets. They have amazing photos of their biz, too.
I really liked this idea of having the walls of the coffee shop be the blackboard. However, Camino is a coffee shop with a wooden interior, so it wouldn't work for my brief, but it's definitely interesting. It's funky and different and eye catching.