If you want a good skin, the most important thing is to take care of it daily. Make it your habit. Your diet also plays an important part, so does getting adequate sleep and exercise.
If you like your skin to be young forever, follow these basic rules:

1. Cleanse your skin twice a day with products suited to your skin type.
2. See a beauty therapist regularly after the age of 25
3. Learn to treat the skin according to its type.
4. Avoid sun.
5. Avoid smoking.
6. Drink 8 glasses of water daily.
7. Use a face mask once a week.
8. Exercise regularly.
9. Remember that a regular care & routine pays you back.
10. Neglect accelerates ageing more than anything else.