The easiest way to prevent lice is to avoid sharing combs, brushes, hats, clothing and other items with people. If you are concerned about head lice, have someone check your scalp at least once a month to make sure you have not been exposed.
If you are concerned that you may have lice, wash all clothes, bedding, combs, towels, etc. You can also use special combs, shampoos and conditioners designed specifically to get rid of lice. Also, try saturating hair with baby oil at night to kill both lice and their eggs. If you do this, wrap a towel around your head to keep from soiling your bedding and be sure to wash your hair thoroughly in the morning.