First step: braid your hair down the middle of your back and tie with a clear elastic. Next and last step: Wrap the braid around itself like you're making a bun and then use another clear elastic to hold it in place. (The spin pin didn't work as well here as an elastic). I kept the end of the braid loose for visual interest.
You can wear this high or low on your head, depending on the look you want. Here, it was a low bun for work. This is also a really easy style to wear when you have wet hair and need to pull it back.