for you, simply not eating like a slob will do wonders for your body composition.
seriously, eating a whole food that you actually have to cook (think chicken, potatoes, fresh veggies, etc) and not eating a veritable shit-ton of it, will help tremendously.
laying out a specific neurotic BBer-type diet plan would be pointless as you probably wouldnt stick to it (a baseless assumption on my part, but probably accurate). you need to get into the habit of making better food choices.
generally meals should consist of a lean protein (chicken, beef, turkey, eggs, cottage cheese, fish) fiber and carbs (fruit, veggies, oatmeal, whole grain breads, potatos, cereal), and essential fatty acids (fish oil, olive oil, peanut butter, avocado, nuts).