I just posted this somewhere else but I figured it might be useful to a bunch of other people. For those that haven't booked their hotels and flights, rental cars, greyhounds and everything else that needs booking...

When you are on the website and it asks for a coupon or promotional code, put the address of the website into www.retailmenot.com and it will give you a list of all the discounts you can get.

I got a discount on a night's stay in Orlando just for the effort. Sometimes it doesn't work, sometimes you get 25% off.

Enjoy.