Since I've lived in Northern climates almost my entire life I have often had dry, chapped lips in the winter. The best thing I have found is the Lip Balm from the Body Shop. They make it in many different flavors. I slather on a really thick layer after I brush my teeth to go to bed and then in the morning and throughout the next day I use a thin layer (like you'd use chapstick). Seriously there is a noticable difference after the first day and within 2-3 days usually the problem is completely gone. After that I just go back to chapstick or gloss as usual. Oh, and it's best if it's kind of soft--like if it's been in your pocket or a warm room--then you can really slather it on

Good Luck!