It's important to exfoliate the lips often for baby soft and smooth lips (if you love your lips to look good and for lipsticks to stay on perfectly).
Exfoliating the lips regularly help remove the dead, flaky and dry skin covering the lips to reveal newer and softer skin. Regular exfoliation also work great to ease dry lips usually caused by changes in weather, dehydration, medications and more.
With the regular sugar (or anyone available at any point in time) and olive oil mix together and used as a scrub, the lips will come out looking good.
Another useful tip is to brush the lips after brushing the teeth in the morning. If you didn't know how to do this, watch this short video above.