Hi, Joshua! For me, traveling to Walt Disney World is almost as much about the food as it is the attractions, so I know how important it is for you to snag reservations for some of the most memorable dining experiences.
The first thing I think is important is flexibility. When I go to the
Walt Disney World Dining webpage, instead of choosing a specific restaurant or a certain time, I put in the date, the number in my party, and the meal we want to eat - breakfast, lunch, or dinner. I can then browse which restaurants are available, and see a window of times I may not have seen if I entered a certain time. It may be that you can do a later or earlier dinner and find a spot available at one of the hot spots at Walt Disney World.
I'm always looking for something different - off the beaten path. If I'm not having any luck getting into Cinderella's Royal Table, I might still run into the princess of all princesses - Cinderella - at dinner at
1900 Park Fare at the Grand Floridian. It may be tougher to get a table for the hoopla at Whispering Canyon Cafe, but I can get some similarly delicious comfort foods at
Trail's End Restaurant at Ft. Wilderness.
Also, check every day. If I'm on a mission for a certain meal, I check as soon as I wake up in the morning, and maybe again another time or two throughout the day. Cancellations happen all the time, and you may find one.
Lastly, always check at the restaurant when you're there. They may be able to find a spot for you.
Happy dining!