I try to keep myself at 30% protein, 30% fat, 40% carbs, though sometimes I go high on the carbs and low on the other. Sometimes i feel like I don't get enough fat either, then I overcompensate with bad fat like I have the last few days.
Oatmeal was always a satisfying breakfast for me when I was being more strict with calories, but didn't keep me full for long. I love it, though, so I ate it fairly often. Now I do frozen fruit smoothies with protein powder that I throw in the car and take to work with me. Fage with something like Kashi go lean and some fruit is really good, like Wendy said. String cheese, small amounts of peanut butter, small quantities or nuts, that kind of thing. And, some fat is good - cutting it all out or cutting it too low isn't a good thing.