Make plenty of eye contact. Keep your hands in your lap, folded in need be, but keep them still. Don't answer anything that wasn't asked. I know that sounds rough, but think of it this way: too often, people being interviewed ramble on, thinking more information is better. Answer all questions clearly and concisely, but make your point quickly.
And....ask a few questions of your own. Ask what a typical day is like. Ask what the expectations are of your position. Ask about support staff. If possible, know a bit of background about the hiring company.
Good luck, again.
How can we sleep while our beds are burning???