Lots of people are lovin the sock bun curls (Tutorial here). It's supposed to make the curls shown on the right. It worked well for me, but unfortunately, a little too well. My hair was defying lots of gravity in all it's Shirley Temple glory, but if you have straighter hair, I bet it will work great. The how to make a sock bun tutorial is here and a sock donut here. Let me know if you have success!