I suck at it. I actually emailed my companion yesterday to see if we can get together for this month. She's got 4 kids, I've got my two...and the people on our route do not have toddler-friendly homes! So scheduling is a nightmare for us. Most months we end up talking to them on the phone. She was in the RS presidency, so she often visited with them anyhow. But I need to step up my VTing.
My VTers are faithful. I think in the year I've lived here they've only not come 1 or 2 times! I should take a few leaves from their books or something.
Incidentally, the only real reason that I can put my finger on that I'm active right now is from an excellent VTer/HTer couple. So you'd think I'd be better at it, huh?