One big thing that will help is drinking all water. Don't drink any soda at all, just drink water. This helps a ton. Drinking OJ in the morning is cool and drinking low-fat or skim milk is good too for the protein.
Also, make sure you get a good breakfast as it is the most important meal of the day. If you eat a right breakfast, you shouldn't over-eat later in the day and you will burn up the carbs and cals you intake from breakfast easier. Try to eat a balanced breakfast, i.e. 1 or 2 bread servings (cereal, with 5g of sugar per serving or less and low fat milk, bagels, english muffins, low fat yogurts, etc.), 1 fruit and 1 dairy. You need to intake lots of carbs in the morning to give you energy for when you work-out or whatever later in the day.
Just to give you an example...2 english muffins with low fat jam (strawberry
), a glass or milk or OJ, and some freshly cut blueberrires. Mmmm.