Locally there are the coupon books but they tend to be for only 10% off.
Best ones are usually by registering with their own websites.
When you register always enter your Birthday as teh day you travel as they send Birthday offers usually valid for 14 days. Most want a US address or ZIP code, use this.
World of Disney
Disney Village Marketplace
Lake Buena Vista, FL 32830
I just got 3 coupons this week from Sweet Tomatoe, buy one meal get one free, usually get 3 a month (3 different email ads)
Tony Romas send a free Entree coupon for Birthdays + $5 off if you spend $20 from time to time.
Others to register with Logans Roadhouse, Chilis, Smokey Bones, Any you can find register.
Bubbalous have a $5 off $25 print out
http://www.bubbalouscatering.com/Restaurant-Coupons.aspx
Lastly buy the Orlando Sentinel on a Sunday, takes 2 to lift it with so many coupons in. Or get a friend that lives local, our friends keep us a load ready for when we arrive.