At a party yesterday, a beautiful friend of mine shared her secret to smooth, pillowy lips.
Every week, she brushes her lips with a firm tooth brush. Not a fancy one, but a cheap store brand with short, firm bristles, and then generously applies petroleum jelly to them. She leaves the jelly on as she sleeps, and simply tissues off any remaining in the morning.
Whoola - lips that are soft, smooth and a bit plumper from the added moisture.