Hi Aweston,
That's a pretty generic question; you'll be much more likely to get a relevant answer if you can include more information, such as,
* What year, engine and transmission do you have?
* When did the rough idle start? Has anything changed with the car around the time the problem started?
* Does it idle rough all the time, or is it different when it's warm or cold?
* Is the check engine light on?
* Have you pulled the OBD-II codes? If so, what did you find?