There are many things to remedy this:
-Drinking lots of water – yes this helps a lot.
-Not all lip balms and chapsticks are created equal. I like this one, and also like Carmex, but anything with menthol will feel good.
-My dentist and orthodontist told me that once my teeth are straightened, I’ll be much less likely to suffer from chapped lips. Something about naturally being able to keep your mouth closed, which was hard to do before I started wearing braces. I think if you breath from your mouth (like I tend to do), you’re more prone to chapped lips. Might have something to do with the act of drawing air over your lips, which probably aids in evaporation of moisture.
-Regular exercise couldn’t hurt – good circulation helps everything.
-Also if you live in a place with very low humidity, it may help to get a humidifier.