I think the first trick is take the stoic tack and figure out how often you actually need chapstick. After all, humanity survived for an awfully long time without it. Build up your tolerance for going without it for a long time (tip: this is easier to do in the summer), and then you will learn an appreciation for when it is actually helpful vs. just a habit or indulgence.
You'll also learn some stuff. For example, that we unconsciously use chapstick to cover up the discomfort of being dehydrated; in fact, a couple glasses of water might be what you need, rather than chapstick. Or the fact that getting toothpaste on your lips dries them out. Apparently sodium laurel sulfate is responsible for this and it's not really a necessary ingredient, it just causes the foamy bubble part of the experience that makes people feel like they're getting their mouth clean. Yes, you buy a product and it creates a problem, but don't worry, you can solve that problem by buying another product! Okay, I am straying a little too far into the paranoid purist realm for my own comfort and will stop now.