discuss prejudice with neighbors, relatives etc.
National Coalition Building Institutes (NCBI)
www.ncbi.org They have one-day workshops that teach effective ways of talking to people who say offensive things around you. It is something I still work on as I still get shocked and taken aback when someone says an outrageously racist or bigoted statement.
Not sure if there is a local organization near you - you will probably have to contact them directly. They have many on college campuses. If you can't find one, contact the Illinois group:
www.ncbiillinois.org VERY effective great program. Wish it was required to graduate at every high school.