Pray for the best, prepare for the worst. If it should happen here... know your neighbors, know who to trust, know who to rely on. If you live in a major city, prepare to get the hell out with as much as you can carry. If you live in the country, prepare to defend yourself in the harshest way possible. A violent mob will understand only overwhelming violence directed back at them.
The small township I lived in in WI had no standing police force and due to a dispute with the county, the sheriffs dept. would not render mutual aid off a county road. They simply resurrected an ordinance from the heydays of bootlegging in the '20s and instituted a town posse. Every upstanding citizen who owned property was required to respond if called. Active members were required to keep a rifle or shotgun, 2 days food and 40 rounds of ammo ready for service. One night I got called up to look for an escaped prisoner from the town lockup. He assaulted and injured the constable while escaping and stole his sidearm. I was the most firearms savvy member and was issued a Browning Automatic Rifle from the 30's they had stored in the town hall when we surrounded the house he was holed up in! Fortunately for him he surrendered peacefully. Lots of small towns have dozens of potential deputys in their citizenry. They own rifles already and know how to use them. I think any rioting would be confined to major cities.