This would be for a messy ponytail with a bit of body. Backcomb hair at the base, pulling it straight up in sections, spraying each with hairspray. If you want extra body, try a dry shampoo and/or lightly curl your hair first. Using a paddle brush, smooth into a high, low, or even side pony. Take one small section of hair from the ponytail, wrap it around the elastic band and use a bobby pin to secure.
Gather hair into either a high, low or side pony tail with a smoothing paddle brush. Twist hair to create the bun, try it loose or tight. For a messy bun, loosely backcomb the hair before twisting. Secure bun with bobby pins and spray with Hairspray.
Another option is the messy side bun, where you would curl all your hair first, skip the ponytail and just loosely twist and pin in place. Throw in some braids if you'd like. This can be a good option since you are not going for perfection. Add a texturizing or salt spray to make your hair easier to work with.