i recommend all of my students study and understand the
STAR interview technique, then prep for it with both general and specific questions. Go through the nomination and understand everything in it and be ready to expand on any items in it (with the nomination being so short, it's often hard to adequately explain everything in it). Come up with other examples based on the list of criteria found in section 6.6.2 of the admin manual.
Be prepared for the inevitable final question "Is there anything else you'd like to tell us?" - Have a list of items you definitely want to talk about, and make sure you check them all off during the interview, and try to leave them with something memorable!