I've gotten pretty good at drying ringlets with just a hairdryer and a round boar-hair brush. You can kind of secure the end of a hair segment onto the brush on the end opposite the handle, twist it not quite one rotation around so it's stuck, and then continue to twirl the brush while pulling it down (handle first) and blowdrying the twist that forms above it. It's kind of hard to describe and it took a bit of practice for me to get...but it might help that my hair is slightly wavy and will catch a curl pretty quickly.
I never got the hang of curling with a flat iron and I've never owned a curling iron.
Besides that, my next suggestion would be pin curls. (kidding).
I should find a photo of when my mother did that to me - I had an enormous 'fro 