Avoid thinking about a "diet." The word "diet" can revitaa pro reviews conjure up negative feelings that are counter-productive to what you're trying to accomplish.
Dieters will inevitably learn why simple sugars are bad for them as they stick with their diets. You should also know that diet sodas are not that healthy for you either. They won't necessarily cause weight-gain, but the artificially sweet flavors of diet drinks make some people crave sweet food. If you need a sweet drink, try fruit juice diluted with carbonated water.
Look for a calorie counting program online and keep track of all of the calories that are in the foods you eat. It may even be able to give you the amount of calories that are in foods that do not have a nutrition label.