Establish healthy eating habits. Nutrition has great impact on the condition of our skin. The use of chocolate is controversial, but the basic rules to follow are eating more fruits, vegetables, and fiber.
Drink more water. Your daily intake should be between 6 and 8 glasses, as water helps your skin function properly.
Pay attention to facial care: clean your skin with cleansers and moisturize it in the morning and in the evening, and never go to bed with make-up on. Also, consider using exfoliants to remove dead skin cells.
Avoid too long contact with the sun, especially that of the face.
Don't forget about the exercise. Not only it keeps you fit, but also helps keep your skin healthy.
Don't overlook proper rest. Take no less than 6-8 hours of sleep, and try to avoid stressful situations.