There's been a fair amt of stuff on this already on here, but basically just don't be fake, speak well (enunciate, use proper grammar, and don't say "like" "um" or anything like that), and look the interviewer in the eye. Also, as for Type I's, if you're not going to be an EE or a Meteorology major, forget the Type I. You may get a 4 year Type II.
Edit: forgot to say something