Milk - Swapping whole milk for skim milk will do the trick when it comes to reducing calories.
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Eggs - A simple trick is to use more whites than yolks. Yolks are higher in calories.
Pancakes topping - Forget the maple syrup. All you need is a bit of fresh fruit for all the flavor and sweetness.
Canned tuna - Opt for tuna in water instead of any oil. This will make a big difference in calories.
Burger meat - Red meat is very high in calories. Give chicken burgers a chance. You might like them!
Sausages - Swap pork and beef for turkey. These can be equally delicious at a fraction of the calories.
Chicken - Chicken skin is rich in calories. Remove it and you will have a healthier, low-fat version.
Dilute your fruit juice with water - Fruit juice can be high in calories, so this is a way to still have a tasty drink, but with a lot less calories.
Corn on the cob - Yes, it tastes great with butter, but you can also eat it plain. It will save you around 65 calories (assuming you usually use around two teaspoons).
Bagels - Bagels come in different sizes. Going one size smaller than the one you usually eat will do the trick.