I use Sephora OperationSmile Lip Baume. It works soooooo good and lasts even after a marathon smooch session.
Also, 100% of the proceeds are donated to Operation Smile.
Check it out at
Sephora
Also, make sure that you are putting on some type of Lip Balm before you put on lipstick (lipstick is notorious for drying your lips out).
ZetaAce