I always watch what I eat
What I usually eat in WDW
Breakfast=fruit, yogurt, coffee, water, a small muffin or 1/2 muffin or ww toast
Lunch=depends on where we eat, but usually salad with any cheese, sour cream, dressing removed....Brown Derby I have the tuna cobb...no avacado..Mexico...taco salad w chicken all fattening stuff removed and use salsa for dressing. Other than that I never eat anything fried, sauteed, breaded, drenched...well you get the idea. Keep in mind a serving of protein is the size of yourpalm and starch is the size of a golf ball.
For a snack I love Dole whips...just the pineapple and a pineapple spear.
I also love cocktails in Epcot espically Margaritas and Champagne
Chocolate covered strawberries are a great thing to eat

really!
Dinner=usually a splurge meal for me. I will have an appetizer usually a lean protein like shrimp or sushi, salad (dressing on side) and always fish for an entree..I do eat carbs but cut the portion in half. I never eat from the bread basket either. Sometimes we will split a dessert if it's worth it. I have a cocktail while looking over the menu (vodka martini) and we always have wine with dinner.
I also stay away from SALT..popcorn, hotdogs,chips, pickles and drink tons of water, which I do anyway.
Well that's it...very easy..no secret...Really don't avoid any foods (except salty ones) enjoy in moderation and you will be fine.