One I know of is find someone with a season pass. They can get you the "friends and family" rate. All that I know that do it normally charge like $10/ticket over that as a tip/compensation of sorts.
Season pass holders also get 4 $50 tickets to use at thier discresion.
There was a deal where you could get tickets for buying gasoline at select stations. I forget which ones. Someone else might chime in on that one.