Well, that's a good question! :)
Here are my suggestions on what you might want to do:
- You will find tickets for sale at STUBHUB.com - they won't be cheap, but you will find tickets to every home and away football game the Irish will play this year. I have purchased tickets at STUBHUB before and have always had a good experience with them. If you have to know before you go to ND that you have tickets to the game -- this is your best route.
- Get to know a number of Notre Dame alums who have season tickets or someone who works at the University of Notre Dame -- a few of the departments on campus have tickets to every game. Sometimes these tickets are not spoken for -- Michigan State and USC will be! I've been able to secure many tickets to ND games, over the years, via this route.
- Scout the various websites devoted to Notre Dame football on the internet. The free site: www.ndnation.com has had pages devoted, in the past, to the buying and selling of of football tickets. The pay sites: www.irishsportsdaily.com -- www.irishillustrated.com -- www.irisheyes.com -- will have subscribers selling their tickets to games they can't attend. I've had good luck going this route in the past -- you just have to be checking these sites frequently because minutes after someone posts they have tickets to sell -- they're gone.
- Keep calling the Notre Dame Ticket Office. Usually in August, Notre Dame will start receiving the unsold tickets back from the opposition schools on the schedule. These tickets will come back the week of the game as well -- always a good idea to call the Ticket Office on Monday afternoon of game week. I've had some luck with this in the past as well.
- Just make the trip to Notre Dame Stadium without tickets. I've done this on many occasions over the years and I've made my best "deals" on tickets this way. I've found if you stand at the edge of the parking lot between The Purcell Pavillion and Notre Dame Stadium holding a sign or fingers in the air -- you'll find ND alums who have extra tickets to sell. It helps to have a ND shirt on or hat! I have never, ever, been shut out of finding a ticket this way. Just be patient -- and get there a couple hours before kick-off. Also on Game Day at Notre Dame you'll find a line of people standing outside a "ticket window" on the East side of Notre Dame Stadium -- hours before kick-off. If there are any un-sold tickets to the game -- they can be purchased here. I've never tried this -- so I don't know the success rate of those standing in line.
I hope this helps!