This is a very simple Up-Style.
All you need is two hair ties and two bobby pins. If you have very straight hair; blow it out with product to give it as much volume as possible and then curl before continuing to the next steps (I did curl some of my hair before starting because, I did not want to top to be flat.)
Start off with a simple pony tail
Using another hair tie secure the hair in a half loop (just don't pull it through all the way)
Now work the hair around in a bun shape. This does not have to be neat.
And secure with 2 bobby pins at the top and bottom. If you feel like it is more secure if you add more, go for it!