I don't have many of them, but I absolutely love them. They can make or break an outfit. They make up for my lack of... stature (yeah, I'm a shortie). They can tell so much about the wearer too!
Look around you at the shoes people wear. See if they match the person (if you know them), or try to image what the person is like who wears shoes you find interesting. It's a fun "people watching" exercise in observation.