The Centers for Disease Control and Prevention has offered some common-sense guidelines that everyone can follow to minimize the risk of spread.
Know the symptoms of covid-19, along with other information from the CDC website.
UPDATED: The CDC now recommends wearing a cloth face mask when out of the home. It is believed that this will prevent people with asymptomatic COVID-19 from spreading the disease. Here is the CDC guidance on when and how to wear masks.
Because of the newness of this virus, lots of bad information is making the rounds. The CDC addresses a few common misconceptions on this page.
The WHO has provided additional resources to counter bad information about covid-19.