The best things to do for code watching is subscribe to the thread here on the DIS for the month you want, just watch this codes board, and check mousesavers.com.
If you want to receive an email code, or even snail mail code, some ideas that might help are register with disneyworld.com and request a vacation planning dvd from them. I've gotten lots of offers and I'm a stockholder, a Disney visa cardholder, frequent traveler, I shop at disneyshopping.com. I don't know which if any of those things are the reason why but the more you can hook up with Disney, it seems better to me.
Good luck.