Kiehl's Lip Balm SPF 15, Burt's Bees lip balm, and Neutrogena Lip Moisturizer (SPF 15) are 3 things which have really helped with my dry lip problem. I put on any one of these 3 before applying my lipstick, then wait for 10 minutes, and apply a moisturizing lipstick(no lip liner, find it only adds to the problem) with an SPF(currently my SPF l/s is from Clinique, but many,many brands, both drugstore and dept. store, now have them.) After that, I add whatever kind of gloss I want to, which I continue to reapply throughout the day,if I'm out.(I like Avon Glazewear l/g a lot, and also Bobbi Brown and Lancome Juicy Tubes, as I find them to be moisturizing, whereas some are actually fairly drying.Also, Vaseline seemed to make my lips both more oily and drier--which meant the l/s color came off quicker and the skin on my lips dried up fasted, so I don't use it anymore...) Finally, at night I always put on a Vitamin E capsule over my lips, rub it in, and then add a lip balm over that--a friend of mine who works for a dermatologist taught me about the Vitamin E, and my lips have been a lot less dry ever since I started doing it, so I decided to keep doing it! Anything that might help...
I'm sure you'll get a lot of great advice here,from other MUT members, so your lips should be in their best shape really soon!