To manage portion sizes healthily, consider using smaller plates and bowls, which can create the illusion of larger servings. Additionally, practicing mindfulness while eating helps in recognizing satiety cues, allowing you to stop when you're full. Focus on fruits, vegetables, and whole grains to fill your plate, ensuring you consume nutrient-dense foods while moderating high-calorie items. Finally, learning to read nutrition labels can aid in understanding serving sizes and making informed choices.