After doing as much research as you can about the company and carefully reading the job description, ask specific questions about the organisation and your role there. What's their vision for your position? Will it change and evolve over time? What are the company's goals? Asking industry-specific questions is good too, especially if you've read something topical in the news or if recent government legislation has affected the industry. This will show the interviewer that you're keen, have done your homework and are a go-getter. They're sure to be impressed.