Exfoliate
Use a scrub or make your own. I make mine with sugar and honey.
Mask
Use a lip mask. You can buy one or just use honey or oil. I prefer castor oil. Leave it on as instructed or for 5-10 minutes. Wash off.
Moisturize
You can use an oil again or lip balm or whatever. I strongly recommend using Vaseline; it lasts a long time and works very well. I like to apply an Eos lip balm first, then Vaseline. It moisturizes even more and lasts longer.
Tip: Not rubbing your lips together all the time will make it last longer. Eos + Vaseline will last for hours.
