Well, a helmet goes without saying, of course!
I rode a bit Sunday, even though the humidity in this area was at death-like levels. Got a lot of good attention, even though I don't quite have the folding part down, and I was sweating like a pig, besides. I don't know why I can fold the darn thing so easily in my house, but on the road I can barely get the stem latch to go down. I need to practice some more so that the people who say "ooh, that's neat!" don't have to watch me wrestle around with the thing for 15 minutes.