Start with the kind of breakfast cereal you like. It is important to know how many calories are in each serving and the size of a serving. Most serving sizes are 3/4 cup. Who eats 3/4 cup of cereal?
You can eat up to 200 calories of cereal. It is best to pick a protein and fiber rich cereal such as Kashi or Special K Protein. Switch off your cereal choice to keep things from getting too boring. If you have a sweet tooth, Lucky Charms and Cocoa Puffs are pretty low in calories.
Be sure to measure out your serving. If your cereal is 120 calories per serving (3/4 cup equals one serving) then you can eat around 1 1/4 cup cereal. There are many breakfast cereals that will work with this diet, but portion size is key. Make sure you measure every time until you know exactly how much cereal should be in your bowl.
You can use up to 2/3 cup of 1% or non fat milk, anything with a higher fat content also has a higher calorie content.
Be sure to keep low fat snacks around and watch the calories and serving size again. I like string cheese and fruit, peanut butter and reduced fat high fiber crackers like Triscuits, a handful of almonds and a piece of fruit, Low fat yogurt and a cup of fresh fruit. Keep the snacks to 100-120 calories to fit within this diet. Drink plenty of water to keep your self hydrated.