I did this do yesterday, because I was going to the dentist. Why do I need a half when I'm going to the dentist? Because if I pull it into a ponytail or in a bun like usual, It really bugs me when I'm laying back in the chair. Anyway, here's the steps:
1. Pull a small section together in the middle-top of your head with a rubberband. (This is kind of a base where the braids will meet.)
2. Braid a section in a simple braid and pull back to the base and tie with a rubberband. (You can see that I have multiple layers of rubberbands- one for each braid)
4. Curl the hair that is left down. (Or don't.) :)
5. Pull up in a bun the next day and reuse your braids! A little more casual and messy-looking, but it works!