Planning a trip to Walt Disney World take a lot of thought and planning. Even with the best laid plans, one can encounter a bump or two along the way. Here are some common mistakes we see at the Most Magical Place on Earth. Mistake 1 – Not Reserving Table Service Meals in Advance You’ll absolutely need to make a reservation for sit down meals 60 days (at the time of this writing) prior to your arrival. And, beware… they go fast, especially signature and character experiences.