You cannot measure every morsel that passes your lips, but it is a good idea to measure most foods and beverages until you get a feel for portion sizes.
It is a supersized world out there, and most people are surprised to find that their idea of a single serving is actually two or three.
If you are into bells and whistles, there are food scales that are preprogrammed with nutritional information, as well as scales that will keep a running total of your daily food and nutrient intake for you. The only tools you really need, however, are a simple and inexpensive gram scale, dry and liquid measuring cups, and idea on reading food labels.
Among all of the mentioned tools, reading food labels seem to be the most effective way of determining the right kind of food to be bought in the supermarket. It lets you make sensible food selections. Through the Nutrition Facts section in a particular item in the grocery, you can identify the amount of serving sizes provided in that product.
With food labels, you can clearly understand the amount and kinds of nutrients that are provided in the item. Usually, it contains the information on saturated fat, sodium, total...