The Paris Review published a drawing of a map that Vladimir Nabokov used to teach his students how to read Joyce's Ulysses. "Instructors should prepare maps of Dublin with Bloom’s and Stephen’s intertwining itineraries clearly traced," Nabokov said.
I absolutely agree. Ulysses is a geographical novel; even its themes are laid out in a map-like pattern. I'm surprised nobody has put together a Ulysses board game, to tell you the truth. But I didn't learn this fact from Nabokov; years ago, local cartoonist David Lasky created an illustration that laid out the plot and themes of Ulysses on a single sheet of paper tucked inside one of his comics. It's the best study guide to the book that I've ever seen, and I recommend you get your hands on a copy before you try reading Ulysses for the first time. Lasky's scholarship on Joyce is an immeasurable help to those who want to dig into the book without the help of an instructor with the talents of a Nabokov.