There are several versions of this question, including, "What will you do when you're at [job position x]?" When you're preparing for the interview, think about why you would do a good job at the position and what steps you would take to achieve that.
Bring in new ideas and examples of what you have done in the past that have benefited your previous companies. One trick that will help the company visualize you in the position is to tell them exactly what you'd do in the first two weeks at the job. Be specific about what you'd like to accomplish, so it's more believable and impressive.
