Last semester, I was totally alone, doing Facebook, watching Hulu, grading papers, or staring into the abyss for more than 90% of my hours.
This semester, though it's only 3 weeks in, I haven't seen a soul - and I've encouraged folks to come early in the term to discuss an early and difficult project.
I used to get more visitors, but in the time since email (roughly), nearly all of my interaction is through that avenue. And I see students before and after class. "Come to my office," I say, when a line forms after class. And somehow they disappear.
Q: How successful are you with office hours? Are you required to keep them? What tricks do you use to make sure they're not just a dead spot in your day?