I do try to eat "volumetrically" to fill myself up on less calories. I think there was actually a Volumetrics diet at some point. I also notice carbs don't fill me up that well. Fiber-ful carbs are better... but if I'm really hungry can take the edge of but don't fill me up. Even brown rice or quinoa that has more fiber and protein, doesn't fill me up. A combination of protein and fat really fill me up, and I eat tons of veggies and fruit.
For breakfast I do notice if I incorporate healthy fats or extra protein it keeps me full longer. I try to balance my sweet tooth/tendency to go for carbs with some added protein and/or fat for satiety. I really like oatmeal for breakfast, and add 1 c skim milk and usually a banana or other fruit (but that is mostly carbs and a little protein). It helps if I add some ground flax, walnuts, and if I stir an egg into my oatmeal that really helps sustain me until lunchtime. Occasionally I switch to a light English muffin, 1 egg, and Morningstar Farms "sausage" patty sandwich for breakfast. Gosh that just keeps me full for hours, for about 250 calories. Too bad I get tired of it and crave my oatmeal after a few days.
I usually ensure there's meat or seafood, some kind of protein in my main meals and even snacks. I often eat sandwiches for lunch and add 1/4 avocado to a sandwich, and eat a lot of nuts and seeds for afternoon snacks. I do find a Greek yogurt keeps me fills me up longer than a "regular" yogurt, and it does have 2x the protein. However the key combo for me really seems to be protein and (healthy) fat. I can also eat a few raw almonds to tide me over and they really seem to do the trick. Sometimes when I'm hungry or munchy I ask myself if I've had my healthy fats and often the answer is no. Raw nuts are probably the biggest exception I make to eating volumetrically. They're calorie dense, but full of healthy fats, a little protein and fiber, and a 1/2 or 1 oz serving really keeps me full.
Other than that I just eat a lot of veggies to help fill me up for few calories. I try to eat at least two servings of veggies at lunch and at dinner, if not more. I'm the queen of large salads with my dinner. I also eat whole fruits as opposed to dried fruits. Bread and sugary tasting things (either real sugar, or fake sugar like sugar free jello or diet coke) just make me want to eat more bread or sugary things. Of course donuts, cookies, cake etc don't fill me up and seems to trigger a sugar craze in me. Do I even need to say that? You probably figured out for yourself they're not filling.

Good luck!