Skunks are attracted to a place for a number of reasons. Some of the most common are the following:
Unprotected garbage. When you transfer your trash outside for pickup, store it in heavy duty metal or plastic trash cans with lids that will stay on even if the can is knocked over. Never place unprotected bags out on the curb.
Skunks love grubs! Grubs are beetle larva that live underneath of your lawn. Skunks are known for digging small holes in yards as they hunt for them.
Never leave unprotected animal food outside at night. Skunks love to feast on food left out for your dog or cat.
If you have bushes or trees that bear fruits, nuts, or berries you should be sure to clean them up daily, as skunks find a feast in fruit that has fallen to the ground.
Other common attractions for skunks are waste such as bones, egg shells, etc., that has been placed in a compost pit, and seeds that have dropped from your bird feeder.
Making sure all of these "skunk attractants" have been removed should make your yard much less attractive as a home for skunks.