If you're going to count anything, count calories! Regardless of where they come from, the number of calories you consume are what contribute to you weight gain or loss. That said, you want to make sure that you're consuming foods that help you reach your daily nutrient needs (you'd lose weight if you ate 1200 calories of candy or 1200 calories of broccoli per day, but the candy isn't going to deliver the nutrients your body needs...and by no means am I suggesting anyone should eat either of these diets, it's just an example). So, more specifically, look to eat high-quality foods that deliver all the nutrients your body needs to function properly.