How much food to eat when trying to lose fat - Portion sizes

How much should we eat if we are working out?
A good way to measure the amount of food that we need to eat is to measure with our hands.
We know that all our meals should have a combination of proteins, carbohydrates and fats. We use our hands to measure the amount of protein and carbs that we need to it. The assumption here is that we are trying to lose fat, so, to keep it simple we need to eat the same "palm" size portions for proteins and carbs. Example, a palm size portion of protein (fish, meat, eggs) and a palm size portion of carbs (rice, or potatoes, etc). Since we know that fats are more calorie dense that the proteins and carbs, what we do is take a teaspoon of fat, (peanut butter, olive oil, etc).
This quick tip should help on keeping things easy when it comes to measure how much food to eat.