Remove one arm and one leg and drop both off at the TAF office inside the PMAC. Seriously, they go on sale over the summer. Here's the site for last year's info: http://www.lsusports.net/onlineticketing.cfm#football
You might want to check the Ticket Exchange board on this site ... also look at the online classifieds in The Advocate and Times-Picayune. With the new ticket prices this year, I've seen people advertising to sell their tickets. Of course, I've seen many people looking to buy as well. You might get lucky and find someone who is willing to transfer them into your name ... this is a one time offer by the Athletic Dept and the deadline is March 31st.