Moisture loss causes the aging of neck skin. To prevent this problem, you should regularly eat foods containing vitamin F, like corn, sunflower, linseed oils, and nuts.
Exercise is the best way to let your neck look younger. Stretching neck can help a lot.
Neck is prone to being tanned. Especially during the sun-bath, it is better to use a high factor sun block cream.
Spaying perfume on neck could change the skin color. When using perfumes, some people like to spray perfume on neck. As the perfume contains alcohol, when alcohol evaporates, the water also evaporates, this makes the neck skin dry. So it is better to spray perfume in the front, then walk into the perfume scent.