Eat a normal breakfast, maybe even a little more than normal. As far as the raisin bran, most brands have about 6-8 grams of fiber per serving but I don't have a box in my house to see how much is soluble and insoluble fiber. Depending on the ratio, two bowls would make some difference. Also, I don't know too many people who eat a bowl that is equal to the serving size they say, usually most people eat a bowl that is bigger than the serving size.