Summarize the following:
Salt buildup on the lips can cause them to dry out quickly. Changing your diet so that it includes less salt might make a big difference in the texture of your lips. When you do eat salty foods, rinse your lips with warm water afterward so the salt doesn't sit on your lips. Smoking is tough on lips, causing dryness and irritation. If you're a smoker, there are lots of good reasons to  kick the habit, and having healthy lips is one of them. Try to cut back on smoking as much as possible to save your lips from getting damaged. Just like the rest of your skin, the skin on your lips is susceptible to sun damage. Wear lip balm with SPF 15 or higher to protect your lips from getting burned. There's nothing like the cold, dry air of winter to make your lips dry and flaky. If you tend to pick your lips more in the winter than in the summer, that's why. Try pulling your scarf up over your mouth when you go outside to protect your lips from the cold.

Summary:
Eat less salt. Avoid smoking. Protect your lips from sunburn. Cover your face in cold or dry weather.