Some choose to obsessively count calories or macros, and weigh/measure absolutely everything that they are going to eat. While in the very beginning stages this might help you learn what a proper serving size is, unless you are a bodybuilder/figure competitor and every excess milli-pound of fat matters, this is not practical for most of the population, at least for the long term. I do not think that this practice is practical or healthy to keep up for the long haul as it can cause you to stress out over eating, and to potentially develop obsessive thoughts. Furthermore, it isn't practical unless you prepare 100% of your meals and snacks at home, which isn't the case for most of the population. Maybe when you are at home, stick to measuring your carbs with a cup as these serving sizes tend to be much smaller than you'd think, but take the time to learn what an appropriate serving size is.
Eating is meant to be enjoyed, but it is YOUR job to educate yourself so you will know how to make the right decisions most of the time. This is called moderation, and will allow you to achieve YOUR goals and stay consistent year-round. It will also allow you to have a positive relationship with food, not an unhealthy and stressful one. I follow the principle of moderation religiously and it works like a charm, and has become effortless. The best diet around, and the only one that works, is a healthy lifestyle.