I'd say good luck, but you won't need it!
Just have fun and enjoy yourself. I treated my interview invite like a mini vacation. I drove into des moines 2 days before the interview.
First day: Read their entire pdf catalog, went grocery shopping for snacks, ate dinner, and watched cable tv in motel 6. btw, i highly recommend this place. just $35/night. Fairly close to school. Hy Vee, a grocery store, is open 24/7 and has free wifi. There's also a 24/7 diner across the street.
Second day: Hy Vee free wifi throughout the day to check SDN
lol, read dmu interview feedback, drove and walked around downtown des moine, walked around grays lake, and looked at the wakonda club. At night I just steamed my suit, ate dinner at the diner, and went to bed early.
Day of interview: Got up at 4:45am to watch tv, shower, dress up and style my hair (haha I don't have an opportunity to dress up often so I was really looking forward to it). Got to campus around 7:30am and just said a long prayer in my car.
I was relaxed, refreshed, and pumped for the entire day. I'm 99.999_% sure I will accept their admission offer. I'm not going to say 100% because I'm never 100% sure of anything
p.s. don't say that last sentence at the interview. Cheering for all you guys. Hope to meet some future classmates on this thread!